1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * driver/usb/gadget/fsl_qe_udc.c 4 * 5 * Copyright (c) 2006-2008 Freescale Semiconductor, Inc. All rights reserved. 6 * 7 * Xie Xiaobo <X.Xie@freescale.com> 8 * Li Yang <leoli@freescale.com> 9 * Based on bareboard code from Shlomi Gridish. 10 * 11 * Description: 12 * Freescle QE/CPM USB Pheripheral Controller Driver 13 * The controller can be found on MPC8360, MPC8272, and etc. 14 * MPC8360 Rev 1.1 may need QE mircocode update 15 */ 16 17 #undef USB_TRACE 18 19 #include <linux/module.h> 20 #include <linux/kernel.h> 21 #include <linux/ioport.h> 22 #include <linux/types.h> 23 #include <linux/errno.h> 24 #include <linux/err.h> 25 #include <linux/slab.h> 26 #include <linux/list.h> 27 #include <linux/interrupt.h> 28 #include <linux/io.h> 29 #include <linux/moduleparam.h> 30 #include <linux/of_address.h> 31 #include <linux/of_irq.h> 32 #include <linux/of_platform.h> 33 #include <linux/dma-mapping.h> 34 #include <linux/usb/ch9.h> 35 #include <linux/usb/gadget.h> 36 #include <linux/usb/otg.h> 37 #include <soc/fsl/qe/qe.h> 38 #include <asm/cpm.h> 39 #include <asm/dma.h> 40 #include <asm/reg.h> 41 #include "fsl_qe_udc.h" 42 43 #define DRIVER_DESC "Freescale QE/CPM USB Device Controller driver" 44 #define DRIVER_AUTHOR "Xie XiaoBo" 45 #define DRIVER_VERSION "1.0" 46 47 #define DMA_ADDR_INVALID (~(dma_addr_t)0) 48 49 static const char driver_name[] = "fsl_qe_udc"; 50 static const char driver_desc[] = DRIVER_DESC; 51 52 /*ep name is important in gadget, it should obey the convention of ep_match()*/ 53 static const char *const ep_name[] = { 54 "ep0-control", /* everyone has ep0 */ 55 /* 3 configurable endpoints */ 56 "ep1", 57 "ep2", 58 "ep3", 59 }; 60 61 static const struct usb_endpoint_descriptor qe_ep0_desc = { 62 .bLength = USB_DT_ENDPOINT_SIZE, 63 .bDescriptorType = USB_DT_ENDPOINT, 64 65 .bEndpointAddress = 0, 66 .bmAttributes = USB_ENDPOINT_XFER_CONTROL, 67 .wMaxPacketSize = USB_MAX_CTRL_PAYLOAD, 68 }; 69 70 /******************************************************************** 71 * Internal Used Function Start 72 ********************************************************************/ 73 /*----------------------------------------------------------------- 74 * done() - retire a request; caller blocked irqs 75 *--------------------------------------------------------------*/ 76 static void done(struct qe_ep *ep, struct qe_req *req, int status) 77 { 78 struct qe_udc *udc = ep->udc; 79 unsigned char stopped = ep->stopped; 80 81 /* the req->queue pointer is used by ep_queue() func, in which 82 * the request will be added into a udc_ep->queue 'd tail 83 * so here the req will be dropped from the ep->queue 84 */ 85 list_del_init(&req->queue); 86 87 /* req.status should be set as -EINPROGRESS in ep_queue() */ 88 if (req->req.status == -EINPROGRESS) 89 req->req.status = status; 90 else 91 status = req->req.status; 92 93 if (req->mapped) { 94 dma_unmap_single(udc->gadget.dev.parent, 95 req->req.dma, req->req.length, 96 ep_is_in(ep) 97 ? DMA_TO_DEVICE 98 : DMA_FROM_DEVICE); 99 req->req.dma = DMA_ADDR_INVALID; 100 req->mapped = 0; 101 } else 102 dma_sync_single_for_cpu(udc->gadget.dev.parent, 103 req->req.dma, req->req.length, 104 ep_is_in(ep) 105 ? DMA_TO_DEVICE 106 : DMA_FROM_DEVICE); 107 108 if (status && (status != -ESHUTDOWN)) 109 dev_vdbg(udc->dev, "complete %s req %p stat %d len %u/%u\n", 110 ep->ep.name, &req->req, status, 111 req->req.actual, req->req.length); 112 113 /* don't modify queue heads during completion callback */ 114 ep->stopped = 1; 115 spin_unlock(&udc->lock); 116 117 usb_gadget_giveback_request(&ep->ep, &req->req); 118 119 spin_lock(&udc->lock); 120 121 ep->stopped = stopped; 122 } 123 124 /*----------------------------------------------------------------- 125 * nuke(): delete all requests related to this ep 126 *--------------------------------------------------------------*/ 127 static void nuke(struct qe_ep *ep, int status) 128 { 129 /* Whether this eq has request linked */ 130 while (!list_empty(&ep->queue)) { 131 struct qe_req *req = NULL; 132 req = list_entry(ep->queue.next, struct qe_req, queue); 133 134 done(ep, req, status); 135 } 136 } 137 138 /*---------------------------------------------------------------------------* 139 * USB and Endpoint manipulate process, include parameter and register * 140 *---------------------------------------------------------------------------*/ 141 /* @value: 1--set stall 0--clean stall */ 142 static int qe_eprx_stall_change(struct qe_ep *ep, int value) 143 { 144 u16 tem_usep; 145 u8 epnum = ep->epnum; 146 struct qe_udc *udc = ep->udc; 147 148 tem_usep = in_be16(&udc->usb_regs->usb_usep[epnum]); 149 tem_usep = tem_usep & ~USB_RHS_MASK; 150 if (value == 1) 151 tem_usep |= USB_RHS_STALL; 152 else if (ep->dir == USB_DIR_IN) 153 tem_usep |= USB_RHS_IGNORE_OUT; 154 155 out_be16(&udc->usb_regs->usb_usep[epnum], tem_usep); 156 return 0; 157 } 158 159 static int qe_eptx_stall_change(struct qe_ep *ep, int value) 160 { 161 u16 tem_usep; 162 u8 epnum = ep->epnum; 163 struct qe_udc *udc = ep->udc; 164 165 tem_usep = in_be16(&udc->usb_regs->usb_usep[epnum]); 166 tem_usep = tem_usep & ~USB_THS_MASK; 167 if (value == 1) 168 tem_usep |= USB_THS_STALL; 169 else if (ep->dir == USB_DIR_OUT) 170 tem_usep |= USB_THS_IGNORE_IN; 171 172 out_be16(&udc->usb_regs->usb_usep[epnum], tem_usep); 173 174 return 0; 175 } 176 177 static int qe_ep0_stall(struct qe_udc *udc) 178 { 179 qe_eptx_stall_change(&udc->eps[0], 1); 180 qe_eprx_stall_change(&udc->eps[0], 1); 181 udc->ep0_state = WAIT_FOR_SETUP; 182 udc->ep0_dir = 0; 183 return 0; 184 } 185 186 static int qe_eprx_nack(struct qe_ep *ep) 187 { 188 u8 epnum = ep->epnum; 189 struct qe_udc *udc = ep->udc; 190 191 if (ep->state == EP_STATE_IDLE) { 192 /* Set the ep's nack */ 193 clrsetbits_be16(&udc->usb_regs->usb_usep[epnum], 194 USB_RHS_MASK, USB_RHS_NACK); 195 196 /* Mask Rx and Busy interrupts */ 197 clrbits16(&udc->usb_regs->usb_usbmr, 198 (USB_E_RXB_MASK | USB_E_BSY_MASK)); 199 200 ep->state = EP_STATE_NACK; 201 } 202 return 0; 203 } 204 205 static int qe_eprx_normal(struct qe_ep *ep) 206 { 207 struct qe_udc *udc = ep->udc; 208 209 if (ep->state == EP_STATE_NACK) { 210 clrsetbits_be16(&udc->usb_regs->usb_usep[ep->epnum], 211 USB_RTHS_MASK, USB_THS_IGNORE_IN); 212 213 /* Unmask RX interrupts */ 214 out_be16(&udc->usb_regs->usb_usber, 215 USB_E_BSY_MASK | USB_E_RXB_MASK); 216 setbits16(&udc->usb_regs->usb_usbmr, 217 (USB_E_RXB_MASK | USB_E_BSY_MASK)); 218 219 ep->state = EP_STATE_IDLE; 220 ep->has_data = 0; 221 } 222 223 return 0; 224 } 225 226 static int qe_ep_cmd_stoptx(struct qe_ep *ep) 227 { 228 if (ep->udc->soc_type == PORT_CPM) 229 cpm_command(CPM_USB_STOP_TX | (ep->epnum << CPM_USB_EP_SHIFT), 230 CPM_USB_STOP_TX_OPCODE); 231 else 232 qe_issue_cmd(QE_USB_STOP_TX, QE_CR_SUBBLOCK_USB, 233 ep->epnum, 0); 234 235 return 0; 236 } 237 238 static int qe_ep_cmd_restarttx(struct qe_ep *ep) 239 { 240 if (ep->udc->soc_type == PORT_CPM) 241 cpm_command(CPM_USB_RESTART_TX | (ep->epnum << 242 CPM_USB_EP_SHIFT), CPM_USB_RESTART_TX_OPCODE); 243 else 244 qe_issue_cmd(QE_USB_RESTART_TX, QE_CR_SUBBLOCK_USB, 245 ep->epnum, 0); 246 247 return 0; 248 } 249 250 static int qe_ep_flushtxfifo(struct qe_ep *ep) 251 { 252 struct qe_udc *udc = ep->udc; 253 int i; 254 255 i = (int)ep->epnum; 256 257 qe_ep_cmd_stoptx(ep); 258 out_8(&udc->usb_regs->usb_uscom, 259 USB_CMD_FLUSH_FIFO | (USB_CMD_EP_MASK & (ep->epnum))); 260 out_be16(&udc->ep_param[i]->tbptr, in_be16(&udc->ep_param[i]->tbase)); 261 out_be32(&udc->ep_param[i]->tstate, 0); 262 out_be16(&udc->ep_param[i]->tbcnt, 0); 263 264 ep->c_txbd = ep->txbase; 265 ep->n_txbd = ep->txbase; 266 qe_ep_cmd_restarttx(ep); 267 return 0; 268 } 269 270 static int qe_ep_filltxfifo(struct qe_ep *ep) 271 { 272 struct qe_udc *udc = ep->udc; 273 274 out_8(&udc->usb_regs->usb_uscom, 275 USB_CMD_STR_FIFO | (USB_CMD_EP_MASK & (ep->epnum))); 276 return 0; 277 } 278 279 static int qe_epbds_reset(struct qe_udc *udc, int pipe_num) 280 { 281 struct qe_ep *ep; 282 u32 bdring_len; 283 struct qe_bd __iomem *bd; 284 int i; 285 286 ep = &udc->eps[pipe_num]; 287 288 if (ep->dir == USB_DIR_OUT) 289 bdring_len = USB_BDRING_LEN_RX; 290 else 291 bdring_len = USB_BDRING_LEN; 292 293 bd = ep->rxbase; 294 for (i = 0; i < (bdring_len - 1); i++) { 295 out_be32((u32 __iomem *)bd, R_E | R_I); 296 bd++; 297 } 298 out_be32((u32 __iomem *)bd, R_E | R_I | R_W); 299 300 bd = ep->txbase; 301 for (i = 0; i < USB_BDRING_LEN_TX - 1; i++) { 302 out_be32(&bd->buf, 0); 303 out_be32((u32 __iomem *)bd, 0); 304 bd++; 305 } 306 out_be32((u32 __iomem *)bd, T_W); 307 308 return 0; 309 } 310 311 static int qe_ep_reset(struct qe_udc *udc, int pipe_num) 312 { 313 struct qe_ep *ep; 314 u16 tmpusep; 315 316 ep = &udc->eps[pipe_num]; 317 tmpusep = in_be16(&udc->usb_regs->usb_usep[pipe_num]); 318 tmpusep &= ~USB_RTHS_MASK; 319 320 switch (ep->dir) { 321 case USB_DIR_BOTH: 322 qe_ep_flushtxfifo(ep); 323 break; 324 case USB_DIR_OUT: 325 tmpusep |= USB_THS_IGNORE_IN; 326 break; 327 case USB_DIR_IN: 328 qe_ep_flushtxfifo(ep); 329 tmpusep |= USB_RHS_IGNORE_OUT; 330 break; 331 default: 332 break; 333 } 334 out_be16(&udc->usb_regs->usb_usep[pipe_num], tmpusep); 335 336 qe_epbds_reset(udc, pipe_num); 337 338 return 0; 339 } 340 341 static int qe_ep_toggledata01(struct qe_ep *ep) 342 { 343 ep->data01 ^= 0x1; 344 return 0; 345 } 346 347 static int qe_ep_bd_init(struct qe_udc *udc, unsigned char pipe_num) 348 { 349 struct qe_ep *ep = &udc->eps[pipe_num]; 350 unsigned long tmp_addr = 0; 351 struct usb_ep_para __iomem *epparam; 352 int i; 353 struct qe_bd __iomem *bd; 354 int bdring_len; 355 356 if (ep->dir == USB_DIR_OUT) 357 bdring_len = USB_BDRING_LEN_RX; 358 else 359 bdring_len = USB_BDRING_LEN; 360 361 epparam = udc->ep_param[pipe_num]; 362 /* alloc multi-ram for BD rings and set the ep parameters */ 363 tmp_addr = cpm_muram_alloc(sizeof(struct qe_bd) * (bdring_len + 364 USB_BDRING_LEN_TX), QE_ALIGNMENT_OF_BD); 365 if (IS_ERR_VALUE(tmp_addr)) 366 return -ENOMEM; 367 368 out_be16(&epparam->rbase, (u16)tmp_addr); 369 out_be16(&epparam->tbase, (u16)(tmp_addr + 370 (sizeof(struct qe_bd) * bdring_len))); 371 372 out_be16(&epparam->rbptr, in_be16(&epparam->rbase)); 373 out_be16(&epparam->tbptr, in_be16(&epparam->tbase)); 374 375 ep->rxbase = cpm_muram_addr(tmp_addr); 376 ep->txbase = cpm_muram_addr(tmp_addr + (sizeof(struct qe_bd) 377 * bdring_len)); 378 ep->n_rxbd = ep->rxbase; 379 ep->e_rxbd = ep->rxbase; 380 ep->n_txbd = ep->txbase; 381 ep->c_txbd = ep->txbase; 382 ep->data01 = 0; /* data0 */ 383 384 /* Init TX and RX bds */ 385 bd = ep->rxbase; 386 for (i = 0; i < bdring_len - 1; i++) { 387 out_be32(&bd->buf, 0); 388 out_be32((u32 __iomem *)bd, 0); 389 bd++; 390 } 391 out_be32(&bd->buf, 0); 392 out_be32((u32 __iomem *)bd, R_W); 393 394 bd = ep->txbase; 395 for (i = 0; i < USB_BDRING_LEN_TX - 1; i++) { 396 out_be32(&bd->buf, 0); 397 out_be32((u32 __iomem *)bd, 0); 398 bd++; 399 } 400 out_be32(&bd->buf, 0); 401 out_be32((u32 __iomem *)bd, T_W); 402 403 return 0; 404 } 405 406 static int qe_ep_rxbd_update(struct qe_ep *ep) 407 { 408 unsigned int size; 409 int i; 410 unsigned int tmp; 411 struct qe_bd __iomem *bd; 412 unsigned int bdring_len; 413 414 if (ep->rxbase == NULL) 415 return -EINVAL; 416 417 bd = ep->rxbase; 418 419 ep->rxframe = kmalloc(sizeof(*ep->rxframe), GFP_ATOMIC); 420 if (!ep->rxframe) 421 return -ENOMEM; 422 423 qe_frame_init(ep->rxframe); 424 425 if (ep->dir == USB_DIR_OUT) 426 bdring_len = USB_BDRING_LEN_RX; 427 else 428 bdring_len = USB_BDRING_LEN; 429 430 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (bdring_len + 1); 431 ep->rxbuffer = kzalloc(size, GFP_ATOMIC); 432 if (!ep->rxbuffer) { 433 kfree(ep->rxframe); 434 return -ENOMEM; 435 } 436 437 ep->rxbuf_d = virt_to_phys((void *)ep->rxbuffer); 438 if (ep->rxbuf_d == DMA_ADDR_INVALID) { 439 ep->rxbuf_d = dma_map_single(ep->udc->gadget.dev.parent, 440 ep->rxbuffer, 441 size, 442 DMA_FROM_DEVICE); 443 ep->rxbufmap = 1; 444 } else { 445 dma_sync_single_for_device(ep->udc->gadget.dev.parent, 446 ep->rxbuf_d, size, 447 DMA_FROM_DEVICE); 448 ep->rxbufmap = 0; 449 } 450 451 size = ep->ep.maxpacket + USB_CRC_SIZE + 2; 452 tmp = ep->rxbuf_d; 453 tmp = (u32)(((tmp >> 2) << 2) + 4); 454 455 for (i = 0; i < bdring_len - 1; i++) { 456 out_be32(&bd->buf, tmp); 457 out_be32((u32 __iomem *)bd, (R_E | R_I)); 458 tmp = tmp + size; 459 bd++; 460 } 461 out_be32(&bd->buf, tmp); 462 out_be32((u32 __iomem *)bd, (R_E | R_I | R_W)); 463 464 return 0; 465 } 466 467 static int qe_ep_register_init(struct qe_udc *udc, unsigned char pipe_num) 468 { 469 struct qe_ep *ep = &udc->eps[pipe_num]; 470 struct usb_ep_para __iomem *epparam; 471 u16 usep, logepnum; 472 u16 tmp; 473 u8 rtfcr = 0; 474 475 epparam = udc->ep_param[pipe_num]; 476 477 usep = 0; 478 logepnum = (ep->ep.desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); 479 usep |= (logepnum << USB_EPNUM_SHIFT); 480 481 switch (ep->ep.desc->bmAttributes & 0x03) { 482 case USB_ENDPOINT_XFER_BULK: 483 usep |= USB_TRANS_BULK; 484 break; 485 case USB_ENDPOINT_XFER_ISOC: 486 usep |= USB_TRANS_ISO; 487 break; 488 case USB_ENDPOINT_XFER_INT: 489 usep |= USB_TRANS_INT; 490 break; 491 default: 492 usep |= USB_TRANS_CTR; 493 break; 494 } 495 496 switch (ep->dir) { 497 case USB_DIR_OUT: 498 usep |= USB_THS_IGNORE_IN; 499 break; 500 case USB_DIR_IN: 501 usep |= USB_RHS_IGNORE_OUT; 502 break; 503 default: 504 break; 505 } 506 out_be16(&udc->usb_regs->usb_usep[pipe_num], usep); 507 508 rtfcr = 0x30; 509 out_8(&epparam->rbmr, rtfcr); 510 out_8(&epparam->tbmr, rtfcr); 511 512 tmp = (u16)(ep->ep.maxpacket + USB_CRC_SIZE); 513 /* MRBLR must be divisble by 4 */ 514 tmp = (u16)(((tmp >> 2) << 2) + 4); 515 out_be16(&epparam->mrblr, tmp); 516 517 return 0; 518 } 519 520 static int qe_ep_init(struct qe_udc *udc, 521 unsigned char pipe_num, 522 const struct usb_endpoint_descriptor *desc) 523 { 524 struct qe_ep *ep = &udc->eps[pipe_num]; 525 unsigned long flags; 526 int reval = 0; 527 u16 max = 0; 528 529 max = usb_endpoint_maxp(desc); 530 531 /* check the max package size validate for this endpoint */ 532 /* Refer to USB2.0 spec table 9-13, 533 */ 534 if (pipe_num != 0) { 535 switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { 536 case USB_ENDPOINT_XFER_BULK: 537 if (strstr(ep->ep.name, "-iso") 538 || strstr(ep->ep.name, "-int")) 539 goto en_done; 540 switch (udc->gadget.speed) { 541 case USB_SPEED_HIGH: 542 if ((max == 128) || (max == 256) || (max == 512)) 543 break; 544 fallthrough; 545 default: 546 switch (max) { 547 case 4: 548 case 8: 549 case 16: 550 case 32: 551 case 64: 552 break; 553 default: 554 case USB_SPEED_LOW: 555 goto en_done; 556 } 557 } 558 break; 559 case USB_ENDPOINT_XFER_INT: 560 if (strstr(ep->ep.name, "-iso")) /* bulk is ok */ 561 goto en_done; 562 switch (udc->gadget.speed) { 563 case USB_SPEED_HIGH: 564 if (max <= 1024) 565 break; 566 fallthrough; 567 case USB_SPEED_FULL: 568 if (max <= 64) 569 break; 570 fallthrough; 571 default: 572 if (max <= 8) 573 break; 574 goto en_done; 575 } 576 break; 577 case USB_ENDPOINT_XFER_ISOC: 578 if (strstr(ep->ep.name, "-bulk") 579 || strstr(ep->ep.name, "-int")) 580 goto en_done; 581 switch (udc->gadget.speed) { 582 case USB_SPEED_HIGH: 583 if (max <= 1024) 584 break; 585 fallthrough; 586 case USB_SPEED_FULL: 587 if (max <= 1023) 588 break; 589 fallthrough; 590 default: 591 goto en_done; 592 } 593 break; 594 case USB_ENDPOINT_XFER_CONTROL: 595 if (strstr(ep->ep.name, "-iso") 596 || strstr(ep->ep.name, "-int")) 597 goto en_done; 598 switch (udc->gadget.speed) { 599 case USB_SPEED_HIGH: 600 case USB_SPEED_FULL: 601 switch (max) { 602 case 1: 603 case 2: 604 case 4: 605 case 8: 606 case 16: 607 case 32: 608 case 64: 609 break; 610 default: 611 goto en_done; 612 } 613 fallthrough; 614 case USB_SPEED_LOW: 615 switch (max) { 616 case 1: 617 case 2: 618 case 4: 619 case 8: 620 break; 621 default: 622 goto en_done; 623 } 624 default: 625 goto en_done; 626 } 627 break; 628 629 default: 630 goto en_done; 631 } 632 } /* if ep0*/ 633 634 spin_lock_irqsave(&udc->lock, flags); 635 636 /* initialize ep structure */ 637 ep->ep.maxpacket = max; 638 ep->tm = (u8)(desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK); 639 ep->ep.desc = desc; 640 ep->stopped = 0; 641 ep->init = 1; 642 643 if (pipe_num == 0) { 644 ep->dir = USB_DIR_BOTH; 645 udc->ep0_dir = USB_DIR_OUT; 646 udc->ep0_state = WAIT_FOR_SETUP; 647 } else { 648 switch (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) { 649 case USB_DIR_OUT: 650 ep->dir = USB_DIR_OUT; 651 break; 652 case USB_DIR_IN: 653 ep->dir = USB_DIR_IN; 654 default: 655 break; 656 } 657 } 658 659 /* hardware special operation */ 660 qe_ep_bd_init(udc, pipe_num); 661 if ((ep->tm == USBP_TM_CTL) || (ep->dir == USB_DIR_OUT)) { 662 reval = qe_ep_rxbd_update(ep); 663 if (reval) 664 goto en_done1; 665 } 666 667 if ((ep->tm == USBP_TM_CTL) || (ep->dir == USB_DIR_IN)) { 668 ep->txframe = kmalloc(sizeof(*ep->txframe), GFP_ATOMIC); 669 if (!ep->txframe) 670 goto en_done2; 671 qe_frame_init(ep->txframe); 672 } 673 674 qe_ep_register_init(udc, pipe_num); 675 676 /* Now HW will be NAKing transfers to that EP, 677 * until a buffer is queued to it. */ 678 spin_unlock_irqrestore(&udc->lock, flags); 679 680 return 0; 681 en_done2: 682 kfree(ep->rxbuffer); 683 kfree(ep->rxframe); 684 en_done1: 685 spin_unlock_irqrestore(&udc->lock, flags); 686 en_done: 687 dev_err(udc->dev, "failed to initialize %s\n", ep->ep.name); 688 return -ENODEV; 689 } 690 691 static inline void qe_usb_enable(struct qe_udc *udc) 692 { 693 setbits8(&udc->usb_regs->usb_usmod, USB_MODE_EN); 694 } 695 696 static inline void qe_usb_disable(struct qe_udc *udc) 697 { 698 clrbits8(&udc->usb_regs->usb_usmod, USB_MODE_EN); 699 } 700 701 /*----------------------------------------------------------------------------* 702 * USB and EP basic manipulate function end * 703 *----------------------------------------------------------------------------*/ 704 705 706 /****************************************************************************** 707 UDC transmit and receive process 708 ******************************************************************************/ 709 static void recycle_one_rxbd(struct qe_ep *ep) 710 { 711 u32 bdstatus; 712 713 bdstatus = in_be32((u32 __iomem *)ep->e_rxbd); 714 bdstatus = R_I | R_E | (bdstatus & R_W); 715 out_be32((u32 __iomem *)ep->e_rxbd, bdstatus); 716 717 if (bdstatus & R_W) 718 ep->e_rxbd = ep->rxbase; 719 else 720 ep->e_rxbd++; 721 } 722 723 static void recycle_rxbds(struct qe_ep *ep, unsigned char stopatnext) 724 { 725 u32 bdstatus; 726 struct qe_bd __iomem *bd, *nextbd; 727 unsigned char stop = 0; 728 729 nextbd = ep->n_rxbd; 730 bd = ep->e_rxbd; 731 bdstatus = in_be32((u32 __iomem *)bd); 732 733 while (!(bdstatus & R_E) && !(bdstatus & BD_LENGTH_MASK) && !stop) { 734 bdstatus = R_E | R_I | (bdstatus & R_W); 735 out_be32((u32 __iomem *)bd, bdstatus); 736 737 if (bdstatus & R_W) 738 bd = ep->rxbase; 739 else 740 bd++; 741 742 bdstatus = in_be32((u32 __iomem *)bd); 743 if (stopatnext && (bd == nextbd)) 744 stop = 1; 745 } 746 747 ep->e_rxbd = bd; 748 } 749 750 static void ep_recycle_rxbds(struct qe_ep *ep) 751 { 752 struct qe_bd __iomem *bd = ep->n_rxbd; 753 u32 bdstatus; 754 u8 epnum = ep->epnum; 755 struct qe_udc *udc = ep->udc; 756 757 bdstatus = in_be32((u32 __iomem *)bd); 758 if (!(bdstatus & R_E) && !(bdstatus & BD_LENGTH_MASK)) { 759 bd = ep->rxbase + 760 ((in_be16(&udc->ep_param[epnum]->rbptr) - 761 in_be16(&udc->ep_param[epnum]->rbase)) 762 >> 3); 763 bdstatus = in_be32((u32 __iomem *)bd); 764 765 if (bdstatus & R_W) 766 bd = ep->rxbase; 767 else 768 bd++; 769 770 ep->e_rxbd = bd; 771 recycle_rxbds(ep, 0); 772 ep->e_rxbd = ep->n_rxbd; 773 } else 774 recycle_rxbds(ep, 1); 775 776 if (in_be16(&udc->usb_regs->usb_usber) & USB_E_BSY_MASK) 777 out_be16(&udc->usb_regs->usb_usber, USB_E_BSY_MASK); 778 779 if (ep->has_data <= 0 && (!list_empty(&ep->queue))) 780 qe_eprx_normal(ep); 781 782 ep->localnack = 0; 783 } 784 785 static void setup_received_handle(struct qe_udc *udc, 786 struct usb_ctrlrequest *setup); 787 static int qe_ep_rxframe_handle(struct qe_ep *ep); 788 static void ep0_req_complete(struct qe_udc *udc, struct qe_req *req); 789 /* when BD PID is setup, handle the packet */ 790 static int ep0_setup_handle(struct qe_udc *udc) 791 { 792 struct qe_ep *ep = &udc->eps[0]; 793 struct qe_frame *pframe; 794 unsigned int fsize; 795 u8 *cp; 796 797 pframe = ep->rxframe; 798 if ((frame_get_info(pframe) & PID_SETUP) 799 && (udc->ep0_state == WAIT_FOR_SETUP)) { 800 fsize = frame_get_length(pframe); 801 if (unlikely(fsize != 8)) 802 return -EINVAL; 803 cp = (u8 *)&udc->local_setup_buff; 804 memcpy(cp, pframe->data, fsize); 805 ep->data01 = 1; 806 807 /* handle the usb command base on the usb_ctrlrequest */ 808 setup_received_handle(udc, &udc->local_setup_buff); 809 return 0; 810 } 811 return -EINVAL; 812 } 813 814 static int qe_ep0_rx(struct qe_udc *udc) 815 { 816 struct qe_ep *ep = &udc->eps[0]; 817 struct qe_frame *pframe; 818 struct qe_bd __iomem *bd; 819 u32 bdstatus, length; 820 u32 vaddr; 821 822 pframe = ep->rxframe; 823 824 if (ep->dir == USB_DIR_IN) { 825 dev_err(udc->dev, "ep0 not a control endpoint\n"); 826 return -EINVAL; 827 } 828 829 bd = ep->n_rxbd; 830 bdstatus = in_be32((u32 __iomem *)bd); 831 length = bdstatus & BD_LENGTH_MASK; 832 833 while (!(bdstatus & R_E) && length) { 834 if ((bdstatus & R_F) && (bdstatus & R_L) 835 && !(bdstatus & R_ERROR)) { 836 if (length == USB_CRC_SIZE) { 837 udc->ep0_state = WAIT_FOR_SETUP; 838 dev_vdbg(udc->dev, 839 "receive a ZLP in status phase\n"); 840 } else { 841 qe_frame_clean(pframe); 842 vaddr = (u32)phys_to_virt(in_be32(&bd->buf)); 843 frame_set_data(pframe, (u8 *)vaddr); 844 frame_set_length(pframe, 845 (length - USB_CRC_SIZE)); 846 frame_set_status(pframe, FRAME_OK); 847 switch (bdstatus & R_PID) { 848 case R_PID_SETUP: 849 frame_set_info(pframe, PID_SETUP); 850 break; 851 case R_PID_DATA1: 852 frame_set_info(pframe, PID_DATA1); 853 break; 854 default: 855 frame_set_info(pframe, PID_DATA0); 856 break; 857 } 858 859 if ((bdstatus & R_PID) == R_PID_SETUP) 860 ep0_setup_handle(udc); 861 else 862 qe_ep_rxframe_handle(ep); 863 } 864 } else { 865 dev_err(udc->dev, "The receive frame with error!\n"); 866 } 867 868 /* note: don't clear the rxbd's buffer address */ 869 recycle_one_rxbd(ep); 870 871 /* Get next BD */ 872 if (bdstatus & R_W) 873 bd = ep->rxbase; 874 else 875 bd++; 876 877 bdstatus = in_be32((u32 __iomem *)bd); 878 length = bdstatus & BD_LENGTH_MASK; 879 880 } 881 882 ep->n_rxbd = bd; 883 884 return 0; 885 } 886 887 static int qe_ep_rxframe_handle(struct qe_ep *ep) 888 { 889 struct qe_frame *pframe; 890 u8 framepid = 0; 891 unsigned int fsize; 892 u8 *cp; 893 struct qe_req *req; 894 895 pframe = ep->rxframe; 896 897 if (frame_get_info(pframe) & PID_DATA1) 898 framepid = 0x1; 899 900 if (framepid != ep->data01) { 901 dev_err(ep->udc->dev, "the data01 error!\n"); 902 return -EIO; 903 } 904 905 fsize = frame_get_length(pframe); 906 if (list_empty(&ep->queue)) { 907 dev_err(ep->udc->dev, "the %s have no requeue!\n", ep->name); 908 } else { 909 req = list_entry(ep->queue.next, struct qe_req, queue); 910 911 cp = (u8 *)(req->req.buf) + req->req.actual; 912 if (cp) { 913 memcpy(cp, pframe->data, fsize); 914 req->req.actual += fsize; 915 if ((fsize < ep->ep.maxpacket) || 916 (req->req.actual >= req->req.length)) { 917 if (ep->epnum == 0) 918 ep0_req_complete(ep->udc, req); 919 else 920 done(ep, req, 0); 921 if (list_empty(&ep->queue) && ep->epnum != 0) 922 qe_eprx_nack(ep); 923 } 924 } 925 } 926 927 qe_ep_toggledata01(ep); 928 929 return 0; 930 } 931 932 static void ep_rx_tasklet(struct tasklet_struct *t) 933 { 934 struct qe_udc *udc = from_tasklet(udc, t, rx_tasklet); 935 struct qe_ep *ep; 936 struct qe_frame *pframe; 937 struct qe_bd __iomem *bd; 938 unsigned long flags; 939 u32 bdstatus, length; 940 u32 vaddr, i; 941 942 spin_lock_irqsave(&udc->lock, flags); 943 944 for (i = 1; i < USB_MAX_ENDPOINTS; i++) { 945 ep = &udc->eps[i]; 946 947 if (ep->dir == USB_DIR_IN || ep->enable_tasklet == 0) { 948 dev_dbg(udc->dev, 949 "This is a transmit ep or disable tasklet!\n"); 950 continue; 951 } 952 953 pframe = ep->rxframe; 954 bd = ep->n_rxbd; 955 bdstatus = in_be32((u32 __iomem *)bd); 956 length = bdstatus & BD_LENGTH_MASK; 957 958 while (!(bdstatus & R_E) && length) { 959 if (list_empty(&ep->queue)) { 960 qe_eprx_nack(ep); 961 dev_dbg(udc->dev, 962 "The rxep have noreq %d\n", 963 ep->has_data); 964 break; 965 } 966 967 if ((bdstatus & R_F) && (bdstatus & R_L) 968 && !(bdstatus & R_ERROR)) { 969 qe_frame_clean(pframe); 970 vaddr = (u32)phys_to_virt(in_be32(&bd->buf)); 971 frame_set_data(pframe, (u8 *)vaddr); 972 frame_set_length(pframe, 973 (length - USB_CRC_SIZE)); 974 frame_set_status(pframe, FRAME_OK); 975 switch (bdstatus & R_PID) { 976 case R_PID_DATA1: 977 frame_set_info(pframe, PID_DATA1); 978 break; 979 case R_PID_SETUP: 980 frame_set_info(pframe, PID_SETUP); 981 break; 982 default: 983 frame_set_info(pframe, PID_DATA0); 984 break; 985 } 986 /* handle the rx frame */ 987 qe_ep_rxframe_handle(ep); 988 } else { 989 dev_err(udc->dev, 990 "error in received frame\n"); 991 } 992 /* note: don't clear the rxbd's buffer address */ 993 /*clear the length */ 994 out_be32((u32 __iomem *)bd, bdstatus & BD_STATUS_MASK); 995 ep->has_data--; 996 if (!(ep->localnack)) 997 recycle_one_rxbd(ep); 998 999 /* Get next BD */ 1000 if (bdstatus & R_W) 1001 bd = ep->rxbase; 1002 else 1003 bd++; 1004 1005 bdstatus = in_be32((u32 __iomem *)bd); 1006 length = bdstatus & BD_LENGTH_MASK; 1007 } 1008 1009 ep->n_rxbd = bd; 1010 1011 if (ep->localnack) 1012 ep_recycle_rxbds(ep); 1013 1014 ep->enable_tasklet = 0; 1015 } /* for i=1 */ 1016 1017 spin_unlock_irqrestore(&udc->lock, flags); 1018 } 1019 1020 static int qe_ep_rx(struct qe_ep *ep) 1021 { 1022 struct qe_udc *udc; 1023 struct qe_frame *pframe; 1024 struct qe_bd __iomem *bd; 1025 u16 swoffs, ucoffs, emptybds; 1026 1027 udc = ep->udc; 1028 pframe = ep->rxframe; 1029 1030 if (ep->dir == USB_DIR_IN) { 1031 dev_err(udc->dev, "transmit ep in rx function\n"); 1032 return -EINVAL; 1033 } 1034 1035 bd = ep->n_rxbd; 1036 1037 swoffs = (u16)(bd - ep->rxbase); 1038 ucoffs = (u16)((in_be16(&udc->ep_param[ep->epnum]->rbptr) - 1039 in_be16(&udc->ep_param[ep->epnum]->rbase)) >> 3); 1040 if (swoffs < ucoffs) 1041 emptybds = USB_BDRING_LEN_RX - ucoffs + swoffs; 1042 else 1043 emptybds = swoffs - ucoffs; 1044 1045 if (emptybds < MIN_EMPTY_BDS) { 1046 qe_eprx_nack(ep); 1047 ep->localnack = 1; 1048 dev_vdbg(udc->dev, "%d empty bds, send NACK\n", emptybds); 1049 } 1050 ep->has_data = USB_BDRING_LEN_RX - emptybds; 1051 1052 if (list_empty(&ep->queue)) { 1053 qe_eprx_nack(ep); 1054 dev_vdbg(udc->dev, "The rxep have no req queued with %d BDs\n", 1055 ep->has_data); 1056 return 0; 1057 } 1058 1059 tasklet_schedule(&udc->rx_tasklet); 1060 ep->enable_tasklet = 1; 1061 1062 return 0; 1063 } 1064 1065 /* send data from a frame, no matter what tx_req */ 1066 static int qe_ep_tx(struct qe_ep *ep, struct qe_frame *frame) 1067 { 1068 struct qe_udc *udc = ep->udc; 1069 struct qe_bd __iomem *bd; 1070 u16 saveusbmr; 1071 u32 bdstatus, pidmask; 1072 u32 paddr; 1073 1074 if (ep->dir == USB_DIR_OUT) { 1075 dev_err(udc->dev, "receive ep passed to tx function\n"); 1076 return -EINVAL; 1077 } 1078 1079 /* Disable the Tx interrupt */ 1080 saveusbmr = in_be16(&udc->usb_regs->usb_usbmr); 1081 out_be16(&udc->usb_regs->usb_usbmr, 1082 saveusbmr & ~(USB_E_TXB_MASK | USB_E_TXE_MASK)); 1083 1084 bd = ep->n_txbd; 1085 bdstatus = in_be32((u32 __iomem *)bd); 1086 1087 if (!(bdstatus & (T_R | BD_LENGTH_MASK))) { 1088 if (frame_get_length(frame) == 0) { 1089 frame_set_data(frame, udc->nullbuf); 1090 frame_set_length(frame, 2); 1091 frame->info |= (ZLP | NO_CRC); 1092 dev_vdbg(udc->dev, "the frame size = 0\n"); 1093 } 1094 paddr = virt_to_phys((void *)frame->data); 1095 out_be32(&bd->buf, paddr); 1096 bdstatus = (bdstatus&T_W); 1097 if (!(frame_get_info(frame) & NO_CRC)) 1098 bdstatus |= T_R | T_I | T_L | T_TC 1099 | frame_get_length(frame); 1100 else 1101 bdstatus |= T_R | T_I | T_L | frame_get_length(frame); 1102 1103 /* if the packet is a ZLP in status phase */ 1104 if ((ep->epnum == 0) && (udc->ep0_state == DATA_STATE_NEED_ZLP)) 1105 ep->data01 = 0x1; 1106 1107 if (ep->data01) { 1108 pidmask = T_PID_DATA1; 1109 frame->info |= PID_DATA1; 1110 } else { 1111 pidmask = T_PID_DATA0; 1112 frame->info |= PID_DATA0; 1113 } 1114 bdstatus |= T_CNF; 1115 bdstatus |= pidmask; 1116 out_be32((u32 __iomem *)bd, bdstatus); 1117 qe_ep_filltxfifo(ep); 1118 1119 /* enable the TX interrupt */ 1120 out_be16(&udc->usb_regs->usb_usbmr, saveusbmr); 1121 1122 qe_ep_toggledata01(ep); 1123 if (bdstatus & T_W) 1124 ep->n_txbd = ep->txbase; 1125 else 1126 ep->n_txbd++; 1127 1128 return 0; 1129 } else { 1130 out_be16(&udc->usb_regs->usb_usbmr, saveusbmr); 1131 dev_vdbg(udc->dev, "The tx bd is not ready!\n"); 1132 return -EBUSY; 1133 } 1134 } 1135 1136 /* when a bd was transmitted, the function can 1137 * handle the tx_req, not include ep0 */ 1138 static int txcomplete(struct qe_ep *ep, unsigned char restart) 1139 { 1140 if (ep->tx_req != NULL) { 1141 struct qe_req *req = ep->tx_req; 1142 unsigned zlp = 0, last_len = 0; 1143 1144 last_len = min_t(unsigned, req->req.length - ep->sent, 1145 ep->ep.maxpacket); 1146 1147 if (!restart) { 1148 int asent = ep->last; 1149 ep->sent += asent; 1150 ep->last -= asent; 1151 } else { 1152 ep->last = 0; 1153 } 1154 1155 /* zlp needed when req->re.zero is set */ 1156 if (req->req.zero) { 1157 if (last_len == 0 || 1158 (req->req.length % ep->ep.maxpacket) != 0) 1159 zlp = 0; 1160 else 1161 zlp = 1; 1162 } else 1163 zlp = 0; 1164 1165 /* a request already were transmitted completely */ 1166 if (((ep->tx_req->req.length - ep->sent) <= 0) && !zlp) { 1167 done(ep, ep->tx_req, 0); 1168 ep->tx_req = NULL; 1169 ep->last = 0; 1170 ep->sent = 0; 1171 } 1172 } 1173 1174 /* we should gain a new tx_req fot this endpoint */ 1175 if (ep->tx_req == NULL) { 1176 if (!list_empty(&ep->queue)) { 1177 ep->tx_req = list_entry(ep->queue.next, struct qe_req, 1178 queue); 1179 ep->last = 0; 1180 ep->sent = 0; 1181 } 1182 } 1183 1184 return 0; 1185 } 1186 1187 /* give a frame and a tx_req, send some data */ 1188 static int qe_usb_senddata(struct qe_ep *ep, struct qe_frame *frame) 1189 { 1190 unsigned int size; 1191 u8 *buf; 1192 1193 qe_frame_clean(frame); 1194 size = min_t(u32, (ep->tx_req->req.length - ep->sent), 1195 ep->ep.maxpacket); 1196 buf = (u8 *)ep->tx_req->req.buf + ep->sent; 1197 if (buf && size) { 1198 ep->last = size; 1199 ep->tx_req->req.actual += size; 1200 frame_set_data(frame, buf); 1201 frame_set_length(frame, size); 1202 frame_set_status(frame, FRAME_OK); 1203 frame_set_info(frame, 0); 1204 return qe_ep_tx(ep, frame); 1205 } 1206 return -EIO; 1207 } 1208 1209 /* give a frame struct,send a ZLP */ 1210 static int sendnulldata(struct qe_ep *ep, struct qe_frame *frame, uint infor) 1211 { 1212 struct qe_udc *udc = ep->udc; 1213 1214 if (frame == NULL) 1215 return -ENODEV; 1216 1217 qe_frame_clean(frame); 1218 frame_set_data(frame, (u8 *)udc->nullbuf); 1219 frame_set_length(frame, 2); 1220 frame_set_status(frame, FRAME_OK); 1221 frame_set_info(frame, (ZLP | NO_CRC | infor)); 1222 1223 return qe_ep_tx(ep, frame); 1224 } 1225 1226 static int frame_create_tx(struct qe_ep *ep, struct qe_frame *frame) 1227 { 1228 struct qe_req *req = ep->tx_req; 1229 int reval; 1230 1231 if (req == NULL) 1232 return -ENODEV; 1233 1234 if ((req->req.length - ep->sent) > 0) 1235 reval = qe_usb_senddata(ep, frame); 1236 else 1237 reval = sendnulldata(ep, frame, 0); 1238 1239 return reval; 1240 } 1241 1242 /* if direction is DIR_IN, the status is Device->Host 1243 * if direction is DIR_OUT, the status transaction is Device<-Host 1244 * in status phase, udc create a request and gain status */ 1245 static int ep0_prime_status(struct qe_udc *udc, int direction) 1246 { 1247 1248 struct qe_ep *ep = &udc->eps[0]; 1249 1250 if (direction == USB_DIR_IN) { 1251 udc->ep0_state = DATA_STATE_NEED_ZLP; 1252 udc->ep0_dir = USB_DIR_IN; 1253 sendnulldata(ep, ep->txframe, SETUP_STATUS | NO_REQ); 1254 } else { 1255 udc->ep0_dir = USB_DIR_OUT; 1256 udc->ep0_state = WAIT_FOR_OUT_STATUS; 1257 } 1258 1259 return 0; 1260 } 1261 1262 /* a request complete in ep0, whether gadget request or udc request */ 1263 static void ep0_req_complete(struct qe_udc *udc, struct qe_req *req) 1264 { 1265 struct qe_ep *ep = &udc->eps[0]; 1266 /* because usb and ep's status already been set in ch9setaddress() */ 1267 1268 switch (udc->ep0_state) { 1269 case DATA_STATE_XMIT: 1270 done(ep, req, 0); 1271 /* receive status phase */ 1272 if (ep0_prime_status(udc, USB_DIR_OUT)) 1273 qe_ep0_stall(udc); 1274 break; 1275 1276 case DATA_STATE_NEED_ZLP: 1277 done(ep, req, 0); 1278 udc->ep0_state = WAIT_FOR_SETUP; 1279 break; 1280 1281 case DATA_STATE_RECV: 1282 done(ep, req, 0); 1283 /* send status phase */ 1284 if (ep0_prime_status(udc, USB_DIR_IN)) 1285 qe_ep0_stall(udc); 1286 break; 1287 1288 case WAIT_FOR_OUT_STATUS: 1289 done(ep, req, 0); 1290 udc->ep0_state = WAIT_FOR_SETUP; 1291 break; 1292 1293 case WAIT_FOR_SETUP: 1294 dev_vdbg(udc->dev, "Unexpected interrupt\n"); 1295 break; 1296 1297 default: 1298 qe_ep0_stall(udc); 1299 break; 1300 } 1301 } 1302 1303 static int ep0_txcomplete(struct qe_ep *ep, unsigned char restart) 1304 { 1305 struct qe_req *tx_req = NULL; 1306 struct qe_frame *frame = ep->txframe; 1307 1308 if ((frame_get_info(frame) & (ZLP | NO_REQ)) == (ZLP | NO_REQ)) { 1309 if (!restart) 1310 ep->udc->ep0_state = WAIT_FOR_SETUP; 1311 else 1312 sendnulldata(ep, ep->txframe, SETUP_STATUS | NO_REQ); 1313 return 0; 1314 } 1315 1316 tx_req = ep->tx_req; 1317 if (tx_req != NULL) { 1318 if (!restart) { 1319 int asent = ep->last; 1320 ep->sent += asent; 1321 ep->last -= asent; 1322 } else { 1323 ep->last = 0; 1324 } 1325 1326 /* a request already were transmitted completely */ 1327 if ((ep->tx_req->req.length - ep->sent) <= 0) { 1328 ep->tx_req->req.actual = (unsigned int)ep->sent; 1329 ep0_req_complete(ep->udc, ep->tx_req); 1330 ep->tx_req = NULL; 1331 ep->last = 0; 1332 ep->sent = 0; 1333 } 1334 } else { 1335 dev_vdbg(ep->udc->dev, "the ep0_controller have no req\n"); 1336 } 1337 1338 return 0; 1339 } 1340 1341 static int ep0_txframe_handle(struct qe_ep *ep) 1342 { 1343 /* if have error, transmit again */ 1344 if (frame_get_status(ep->txframe) & FRAME_ERROR) { 1345 qe_ep_flushtxfifo(ep); 1346 dev_vdbg(ep->udc->dev, "The EP0 transmit data have error!\n"); 1347 if (frame_get_info(ep->txframe) & PID_DATA0) 1348 ep->data01 = 0; 1349 else 1350 ep->data01 = 1; 1351 1352 ep0_txcomplete(ep, 1); 1353 } else 1354 ep0_txcomplete(ep, 0); 1355 1356 frame_create_tx(ep, ep->txframe); 1357 return 0; 1358 } 1359 1360 static int qe_ep0_txconf(struct qe_ep *ep) 1361 { 1362 struct qe_bd __iomem *bd; 1363 struct qe_frame *pframe; 1364 u32 bdstatus; 1365 1366 bd = ep->c_txbd; 1367 bdstatus = in_be32((u32 __iomem *)bd); 1368 while (!(bdstatus & T_R) && (bdstatus & ~T_W)) { 1369 pframe = ep->txframe; 1370 1371 /* clear and recycle the BD */ 1372 out_be32((u32 __iomem *)bd, bdstatus & T_W); 1373 out_be32(&bd->buf, 0); 1374 if (bdstatus & T_W) 1375 ep->c_txbd = ep->txbase; 1376 else 1377 ep->c_txbd++; 1378 1379 if (ep->c_txbd == ep->n_txbd) { 1380 if (bdstatus & DEVICE_T_ERROR) { 1381 frame_set_status(pframe, FRAME_ERROR); 1382 if (bdstatus & T_TO) 1383 pframe->status |= TX_ER_TIMEOUT; 1384 if (bdstatus & T_UN) 1385 pframe->status |= TX_ER_UNDERUN; 1386 } 1387 ep0_txframe_handle(ep); 1388 } 1389 1390 bd = ep->c_txbd; 1391 bdstatus = in_be32((u32 __iomem *)bd); 1392 } 1393 1394 return 0; 1395 } 1396 1397 static int ep_txframe_handle(struct qe_ep *ep) 1398 { 1399 if (frame_get_status(ep->txframe) & FRAME_ERROR) { 1400 qe_ep_flushtxfifo(ep); 1401 dev_vdbg(ep->udc->dev, "The EP0 transmit data have error!\n"); 1402 if (frame_get_info(ep->txframe) & PID_DATA0) 1403 ep->data01 = 0; 1404 else 1405 ep->data01 = 1; 1406 1407 txcomplete(ep, 1); 1408 } else 1409 txcomplete(ep, 0); 1410 1411 frame_create_tx(ep, ep->txframe); /* send the data */ 1412 return 0; 1413 } 1414 1415 /* confirm the already trainsmited bd */ 1416 static int qe_ep_txconf(struct qe_ep *ep) 1417 { 1418 struct qe_bd __iomem *bd; 1419 struct qe_frame *pframe = NULL; 1420 u32 bdstatus; 1421 unsigned char breakonrxinterrupt = 0; 1422 1423 bd = ep->c_txbd; 1424 bdstatus = in_be32((u32 __iomem *)bd); 1425 while (!(bdstatus & T_R) && (bdstatus & ~T_W)) { 1426 pframe = ep->txframe; 1427 if (bdstatus & DEVICE_T_ERROR) { 1428 frame_set_status(pframe, FRAME_ERROR); 1429 if (bdstatus & T_TO) 1430 pframe->status |= TX_ER_TIMEOUT; 1431 if (bdstatus & T_UN) 1432 pframe->status |= TX_ER_UNDERUN; 1433 } 1434 1435 /* clear and recycle the BD */ 1436 out_be32((u32 __iomem *)bd, bdstatus & T_W); 1437 out_be32(&bd->buf, 0); 1438 if (bdstatus & T_W) 1439 ep->c_txbd = ep->txbase; 1440 else 1441 ep->c_txbd++; 1442 1443 /* handle the tx frame */ 1444 ep_txframe_handle(ep); 1445 bd = ep->c_txbd; 1446 bdstatus = in_be32((u32 __iomem *)bd); 1447 } 1448 if (breakonrxinterrupt) 1449 return -EIO; 1450 else 1451 return 0; 1452 } 1453 1454 /* Add a request in queue, and try to transmit a packet */ 1455 static int ep_req_send(struct qe_ep *ep, struct qe_req *req) 1456 { 1457 int reval = 0; 1458 1459 if (ep->tx_req == NULL) { 1460 ep->sent = 0; 1461 ep->last = 0; 1462 txcomplete(ep, 0); /* can gain a new tx_req */ 1463 reval = frame_create_tx(ep, ep->txframe); 1464 } 1465 return reval; 1466 } 1467 1468 /* Maybe this is a good ideal */ 1469 static int ep_req_rx(struct qe_ep *ep, struct qe_req *req) 1470 { 1471 struct qe_udc *udc = ep->udc; 1472 struct qe_frame *pframe = NULL; 1473 struct qe_bd __iomem *bd; 1474 u32 bdstatus, length; 1475 u32 vaddr, fsize; 1476 u8 *cp; 1477 u8 finish_req = 0; 1478 u8 framepid; 1479 1480 if (list_empty(&ep->queue)) { 1481 dev_vdbg(udc->dev, "the req already finish!\n"); 1482 return 0; 1483 } 1484 pframe = ep->rxframe; 1485 1486 bd = ep->n_rxbd; 1487 bdstatus = in_be32((u32 __iomem *)bd); 1488 length = bdstatus & BD_LENGTH_MASK; 1489 1490 while (!(bdstatus & R_E) && length) { 1491 if (finish_req) 1492 break; 1493 if ((bdstatus & R_F) && (bdstatus & R_L) 1494 && !(bdstatus & R_ERROR)) { 1495 qe_frame_clean(pframe); 1496 vaddr = (u32)phys_to_virt(in_be32(&bd->buf)); 1497 frame_set_data(pframe, (u8 *)vaddr); 1498 frame_set_length(pframe, (length - USB_CRC_SIZE)); 1499 frame_set_status(pframe, FRAME_OK); 1500 switch (bdstatus & R_PID) { 1501 case R_PID_DATA1: 1502 frame_set_info(pframe, PID_DATA1); break; 1503 default: 1504 frame_set_info(pframe, PID_DATA0); break; 1505 } 1506 /* handle the rx frame */ 1507 1508 if (frame_get_info(pframe) & PID_DATA1) 1509 framepid = 0x1; 1510 else 1511 framepid = 0; 1512 1513 if (framepid != ep->data01) { 1514 dev_vdbg(udc->dev, "the data01 error!\n"); 1515 } else { 1516 fsize = frame_get_length(pframe); 1517 1518 cp = (u8 *)(req->req.buf) + req->req.actual; 1519 if (cp) { 1520 memcpy(cp, pframe->data, fsize); 1521 req->req.actual += fsize; 1522 if ((fsize < ep->ep.maxpacket) 1523 || (req->req.actual >= 1524 req->req.length)) { 1525 finish_req = 1; 1526 done(ep, req, 0); 1527 if (list_empty(&ep->queue)) 1528 qe_eprx_nack(ep); 1529 } 1530 } 1531 qe_ep_toggledata01(ep); 1532 } 1533 } else { 1534 dev_err(udc->dev, "The receive frame with error!\n"); 1535 } 1536 1537 /* note: don't clear the rxbd's buffer address * 1538 * only Clear the length */ 1539 out_be32((u32 __iomem *)bd, (bdstatus & BD_STATUS_MASK)); 1540 ep->has_data--; 1541 1542 /* Get next BD */ 1543 if (bdstatus & R_W) 1544 bd = ep->rxbase; 1545 else 1546 bd++; 1547 1548 bdstatus = in_be32((u32 __iomem *)bd); 1549 length = bdstatus & BD_LENGTH_MASK; 1550 } 1551 1552 ep->n_rxbd = bd; 1553 ep_recycle_rxbds(ep); 1554 1555 return 0; 1556 } 1557 1558 /* only add the request in queue */ 1559 static int ep_req_receive(struct qe_ep *ep, struct qe_req *req) 1560 { 1561 if (ep->state == EP_STATE_NACK) { 1562 if (ep->has_data <= 0) { 1563 /* Enable rx and unmask rx interrupt */ 1564 qe_eprx_normal(ep); 1565 } else { 1566 /* Copy the exist BD data */ 1567 ep_req_rx(ep, req); 1568 } 1569 } 1570 1571 return 0; 1572 } 1573 1574 /******************************************************************** 1575 Internal Used Function End 1576 ********************************************************************/ 1577 1578 /*----------------------------------------------------------------------- 1579 Endpoint Management Functions For Gadget 1580 -----------------------------------------------------------------------*/ 1581 static int qe_ep_enable(struct usb_ep *_ep, 1582 const struct usb_endpoint_descriptor *desc) 1583 { 1584 struct qe_udc *udc; 1585 struct qe_ep *ep; 1586 int retval = 0; 1587 unsigned char epnum; 1588 1589 ep = container_of(_ep, struct qe_ep, ep); 1590 1591 /* catch various bogus parameters */ 1592 if (!_ep || !desc || _ep->name == ep_name[0] || 1593 (desc->bDescriptorType != USB_DT_ENDPOINT)) 1594 return -EINVAL; 1595 1596 udc = ep->udc; 1597 if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN)) 1598 return -ESHUTDOWN; 1599 1600 epnum = (u8)desc->bEndpointAddress & 0xF; 1601 1602 retval = qe_ep_init(udc, epnum, desc); 1603 if (retval != 0) { 1604 cpm_muram_free(cpm_muram_offset(ep->rxbase)); 1605 dev_dbg(udc->dev, "enable ep%d failed\n", ep->epnum); 1606 return -EINVAL; 1607 } 1608 dev_dbg(udc->dev, "enable ep%d successful\n", ep->epnum); 1609 return 0; 1610 } 1611 1612 static int qe_ep_disable(struct usb_ep *_ep) 1613 { 1614 struct qe_udc *udc; 1615 struct qe_ep *ep; 1616 unsigned long flags; 1617 unsigned int size; 1618 1619 ep = container_of(_ep, struct qe_ep, ep); 1620 udc = ep->udc; 1621 1622 if (!_ep || !ep->ep.desc) { 1623 dev_dbg(udc->dev, "%s not enabled\n", _ep ? ep->ep.name : NULL); 1624 return -EINVAL; 1625 } 1626 1627 spin_lock_irqsave(&udc->lock, flags); 1628 /* Nuke all pending requests (does flush) */ 1629 nuke(ep, -ESHUTDOWN); 1630 ep->ep.desc = NULL; 1631 ep->stopped = 1; 1632 ep->tx_req = NULL; 1633 qe_ep_reset(udc, ep->epnum); 1634 spin_unlock_irqrestore(&udc->lock, flags); 1635 1636 cpm_muram_free(cpm_muram_offset(ep->rxbase)); 1637 1638 if (ep->dir == USB_DIR_OUT) 1639 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * 1640 (USB_BDRING_LEN_RX + 1); 1641 else 1642 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * 1643 (USB_BDRING_LEN + 1); 1644 1645 if (ep->dir != USB_DIR_IN) { 1646 kfree(ep->rxframe); 1647 if (ep->rxbufmap) { 1648 dma_unmap_single(udc->gadget.dev.parent, 1649 ep->rxbuf_d, size, 1650 DMA_FROM_DEVICE); 1651 ep->rxbuf_d = DMA_ADDR_INVALID; 1652 } else { 1653 dma_sync_single_for_cpu( 1654 udc->gadget.dev.parent, 1655 ep->rxbuf_d, size, 1656 DMA_FROM_DEVICE); 1657 } 1658 kfree(ep->rxbuffer); 1659 } 1660 1661 if (ep->dir != USB_DIR_OUT) 1662 kfree(ep->txframe); 1663 1664 dev_dbg(udc->dev, "disabled %s OK\n", _ep->name); 1665 return 0; 1666 } 1667 1668 static struct usb_request *qe_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) 1669 { 1670 struct qe_req *req; 1671 1672 req = kzalloc(sizeof(*req), gfp_flags); 1673 if (!req) 1674 return NULL; 1675 1676 req->req.dma = DMA_ADDR_INVALID; 1677 1678 INIT_LIST_HEAD(&req->queue); 1679 1680 return &req->req; 1681 } 1682 1683 static void qe_free_request(struct usb_ep *_ep, struct usb_request *_req) 1684 { 1685 struct qe_req *req; 1686 1687 req = container_of(_req, struct qe_req, req); 1688 1689 if (_req) 1690 kfree(req); 1691 } 1692 1693 static int __qe_ep_queue(struct usb_ep *_ep, struct usb_request *_req) 1694 { 1695 struct qe_ep *ep = container_of(_ep, struct qe_ep, ep); 1696 struct qe_req *req = container_of(_req, struct qe_req, req); 1697 struct qe_udc *udc; 1698 int reval; 1699 1700 udc = ep->udc; 1701 /* catch various bogus parameters */ 1702 if (!_req || !req->req.complete || !req->req.buf 1703 || !list_empty(&req->queue)) { 1704 dev_dbg(udc->dev, "bad params\n"); 1705 return -EINVAL; 1706 } 1707 if (!_ep || (!ep->ep.desc && ep_index(ep))) { 1708 dev_dbg(udc->dev, "bad ep\n"); 1709 return -EINVAL; 1710 } 1711 1712 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) 1713 return -ESHUTDOWN; 1714 1715 req->ep = ep; 1716 1717 /* map virtual address to hardware */ 1718 if (req->req.dma == DMA_ADDR_INVALID) { 1719 req->req.dma = dma_map_single(ep->udc->gadget.dev.parent, 1720 req->req.buf, 1721 req->req.length, 1722 ep_is_in(ep) 1723 ? DMA_TO_DEVICE : 1724 DMA_FROM_DEVICE); 1725 req->mapped = 1; 1726 } else { 1727 dma_sync_single_for_device(ep->udc->gadget.dev.parent, 1728 req->req.dma, req->req.length, 1729 ep_is_in(ep) 1730 ? DMA_TO_DEVICE : 1731 DMA_FROM_DEVICE); 1732 req->mapped = 0; 1733 } 1734 1735 req->req.status = -EINPROGRESS; 1736 req->req.actual = 0; 1737 1738 list_add_tail(&req->queue, &ep->queue); 1739 dev_vdbg(udc->dev, "gadget have request in %s! %d\n", 1740 ep->name, req->req.length); 1741 1742 /* push the request to device */ 1743 if (ep_is_in(ep)) 1744 reval = ep_req_send(ep, req); 1745 1746 /* EP0 */ 1747 if (ep_index(ep) == 0 && req->req.length > 0) { 1748 if (ep_is_in(ep)) 1749 udc->ep0_state = DATA_STATE_XMIT; 1750 else 1751 udc->ep0_state = DATA_STATE_RECV; 1752 } 1753 1754 if (ep->dir == USB_DIR_OUT) 1755 reval = ep_req_receive(ep, req); 1756 1757 return 0; 1758 } 1759 1760 /* queues (submits) an I/O request to an endpoint */ 1761 static int qe_ep_queue(struct usb_ep *_ep, struct usb_request *_req, 1762 gfp_t gfp_flags) 1763 { 1764 struct qe_ep *ep = container_of(_ep, struct qe_ep, ep); 1765 struct qe_udc *udc = ep->udc; 1766 unsigned long flags; 1767 int ret; 1768 1769 spin_lock_irqsave(&udc->lock, flags); 1770 ret = __qe_ep_queue(_ep, _req); 1771 spin_unlock_irqrestore(&udc->lock, flags); 1772 return ret; 1773 } 1774 1775 /* dequeues (cancels, unlinks) an I/O request from an endpoint */ 1776 static int qe_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) 1777 { 1778 struct qe_ep *ep = container_of(_ep, struct qe_ep, ep); 1779 struct qe_req *req = NULL; 1780 struct qe_req *iter; 1781 unsigned long flags; 1782 1783 if (!_ep || !_req) 1784 return -EINVAL; 1785 1786 spin_lock_irqsave(&ep->udc->lock, flags); 1787 1788 /* make sure it's actually queued on this endpoint */ 1789 list_for_each_entry(iter, &ep->queue, queue) { 1790 if (&iter->req != _req) 1791 continue; 1792 req = iter; 1793 break; 1794 } 1795 1796 if (!req) { 1797 spin_unlock_irqrestore(&ep->udc->lock, flags); 1798 return -EINVAL; 1799 } 1800 1801 done(ep, req, -ECONNRESET); 1802 1803 spin_unlock_irqrestore(&ep->udc->lock, flags); 1804 return 0; 1805 } 1806 1807 /*----------------------------------------------------------------- 1808 * modify the endpoint halt feature 1809 * @ep: the non-isochronous endpoint being stalled 1810 * @value: 1--set halt 0--clear halt 1811 * Returns zero, or a negative error code. 1812 *----------------------------------------------------------------*/ 1813 static int qe_ep_set_halt(struct usb_ep *_ep, int value) 1814 { 1815 struct qe_ep *ep; 1816 unsigned long flags; 1817 int status = -EOPNOTSUPP; 1818 struct qe_udc *udc; 1819 1820 ep = container_of(_ep, struct qe_ep, ep); 1821 if (!_ep || !ep->ep.desc) { 1822 status = -EINVAL; 1823 goto out; 1824 } 1825 1826 udc = ep->udc; 1827 /* Attempt to halt IN ep will fail if any transfer requests 1828 * are still queue */ 1829 if (value && ep_is_in(ep) && !list_empty(&ep->queue)) { 1830 status = -EAGAIN; 1831 goto out; 1832 } 1833 1834 status = 0; 1835 spin_lock_irqsave(&ep->udc->lock, flags); 1836 qe_eptx_stall_change(ep, value); 1837 qe_eprx_stall_change(ep, value); 1838 spin_unlock_irqrestore(&ep->udc->lock, flags); 1839 1840 if (ep->epnum == 0) { 1841 udc->ep0_state = WAIT_FOR_SETUP; 1842 udc->ep0_dir = 0; 1843 } 1844 1845 /* set data toggle to DATA0 on clear halt */ 1846 if (value == 0) 1847 ep->data01 = 0; 1848 out: 1849 dev_vdbg(udc->dev, "%s %s halt stat %d\n", ep->ep.name, 1850 value ? "set" : "clear", status); 1851 1852 return status; 1853 } 1854 1855 static const struct usb_ep_ops qe_ep_ops = { 1856 .enable = qe_ep_enable, 1857 .disable = qe_ep_disable, 1858 1859 .alloc_request = qe_alloc_request, 1860 .free_request = qe_free_request, 1861 1862 .queue = qe_ep_queue, 1863 .dequeue = qe_ep_dequeue, 1864 1865 .set_halt = qe_ep_set_halt, 1866 }; 1867 1868 /*------------------------------------------------------------------------ 1869 Gadget Driver Layer Operations 1870 ------------------------------------------------------------------------*/ 1871 1872 /* Get the current frame number */ 1873 static int qe_get_frame(struct usb_gadget *gadget) 1874 { 1875 struct qe_udc *udc = container_of(gadget, struct qe_udc, gadget); 1876 u16 tmp; 1877 1878 tmp = in_be16(&udc->usb_param->frame_n); 1879 if (tmp & 0x8000) 1880 return tmp & 0x07ff; 1881 return -EINVAL; 1882 } 1883 1884 static int fsl_qe_start(struct usb_gadget *gadget, 1885 struct usb_gadget_driver *driver); 1886 static int fsl_qe_stop(struct usb_gadget *gadget); 1887 1888 /* defined in usb_gadget.h */ 1889 static const struct usb_gadget_ops qe_gadget_ops = { 1890 .get_frame = qe_get_frame, 1891 .udc_start = fsl_qe_start, 1892 .udc_stop = fsl_qe_stop, 1893 }; 1894 1895 /*------------------------------------------------------------------------- 1896 USB ep0 Setup process in BUS Enumeration 1897 -------------------------------------------------------------------------*/ 1898 static int udc_reset_ep_queue(struct qe_udc *udc, u8 pipe) 1899 { 1900 struct qe_ep *ep = &udc->eps[pipe]; 1901 1902 nuke(ep, -ECONNRESET); 1903 ep->tx_req = NULL; 1904 return 0; 1905 } 1906 1907 static int reset_queues(struct qe_udc *udc) 1908 { 1909 u8 pipe; 1910 1911 for (pipe = 0; pipe < USB_MAX_ENDPOINTS; pipe++) 1912 udc_reset_ep_queue(udc, pipe); 1913 1914 /* report disconnect; the driver is already quiesced */ 1915 spin_unlock(&udc->lock); 1916 usb_gadget_udc_reset(&udc->gadget, udc->driver); 1917 spin_lock(&udc->lock); 1918 1919 return 0; 1920 } 1921 1922 static void ch9setaddress(struct qe_udc *udc, u16 value, u16 index, 1923 u16 length) 1924 { 1925 /* Save the new address to device struct */ 1926 udc->device_address = (u8) value; 1927 /* Update usb state */ 1928 udc->usb_state = USB_STATE_ADDRESS; 1929 1930 /* Status phase , send a ZLP */ 1931 if (ep0_prime_status(udc, USB_DIR_IN)) 1932 qe_ep0_stall(udc); 1933 } 1934 1935 static void ownercomplete(struct usb_ep *_ep, struct usb_request *_req) 1936 { 1937 struct qe_req *req = container_of(_req, struct qe_req, req); 1938 1939 req->req.buf = NULL; 1940 kfree(req); 1941 } 1942 1943 static void ch9getstatus(struct qe_udc *udc, u8 request_type, u16 value, 1944 u16 index, u16 length) 1945 { 1946 u16 usb_status = 0; 1947 struct qe_req *req; 1948 struct qe_ep *ep; 1949 int status = 0; 1950 1951 ep = &udc->eps[0]; 1952 if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) { 1953 /* Get device status */ 1954 usb_status = 1 << USB_DEVICE_SELF_POWERED; 1955 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) { 1956 /* Get interface status */ 1957 /* We don't have interface information in udc driver */ 1958 usb_status = 0; 1959 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) { 1960 /* Get endpoint status */ 1961 int pipe = index & USB_ENDPOINT_NUMBER_MASK; 1962 struct qe_ep *target_ep = &udc->eps[pipe]; 1963 u16 usep; 1964 1965 /* stall if endpoint doesn't exist */ 1966 if (!target_ep->ep.desc) 1967 goto stall; 1968 1969 usep = in_be16(&udc->usb_regs->usb_usep[pipe]); 1970 if (index & USB_DIR_IN) { 1971 if (target_ep->dir != USB_DIR_IN) 1972 goto stall; 1973 if ((usep & USB_THS_MASK) == USB_THS_STALL) 1974 usb_status = 1 << USB_ENDPOINT_HALT; 1975 } else { 1976 if (target_ep->dir != USB_DIR_OUT) 1977 goto stall; 1978 if ((usep & USB_RHS_MASK) == USB_RHS_STALL) 1979 usb_status = 1 << USB_ENDPOINT_HALT; 1980 } 1981 } 1982 1983 req = container_of(qe_alloc_request(&ep->ep, GFP_KERNEL), 1984 struct qe_req, req); 1985 req->req.length = 2; 1986 req->req.buf = udc->statusbuf; 1987 *(u16 *)req->req.buf = cpu_to_le16(usb_status); 1988 req->req.status = -EINPROGRESS; 1989 req->req.actual = 0; 1990 req->req.complete = ownercomplete; 1991 1992 udc->ep0_dir = USB_DIR_IN; 1993 1994 /* data phase */ 1995 status = __qe_ep_queue(&ep->ep, &req->req); 1996 1997 if (status == 0) 1998 return; 1999 stall: 2000 dev_err(udc->dev, "Can't respond to getstatus request \n"); 2001 qe_ep0_stall(udc); 2002 } 2003 2004 /* only handle the setup request, suppose the device in normal status */ 2005 static void setup_received_handle(struct qe_udc *udc, 2006 struct usb_ctrlrequest *setup) 2007 { 2008 /* Fix Endian (udc->local_setup_buff is cpu Endian now)*/ 2009 u16 wValue = le16_to_cpu(setup->wValue); 2010 u16 wIndex = le16_to_cpu(setup->wIndex); 2011 u16 wLength = le16_to_cpu(setup->wLength); 2012 2013 /* clear the previous request in the ep0 */ 2014 udc_reset_ep_queue(udc, 0); 2015 2016 if (setup->bRequestType & USB_DIR_IN) 2017 udc->ep0_dir = USB_DIR_IN; 2018 else 2019 udc->ep0_dir = USB_DIR_OUT; 2020 2021 switch (setup->bRequest) { 2022 case USB_REQ_GET_STATUS: 2023 /* Data+Status phase form udc */ 2024 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK)) 2025 != (USB_DIR_IN | USB_TYPE_STANDARD)) 2026 break; 2027 ch9getstatus(udc, setup->bRequestType, wValue, wIndex, 2028 wLength); 2029 return; 2030 2031 case USB_REQ_SET_ADDRESS: 2032 /* Status phase from udc */ 2033 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD | 2034 USB_RECIP_DEVICE)) 2035 break; 2036 ch9setaddress(udc, wValue, wIndex, wLength); 2037 return; 2038 2039 case USB_REQ_CLEAR_FEATURE: 2040 case USB_REQ_SET_FEATURE: 2041 /* Requests with no data phase, status phase from udc */ 2042 if ((setup->bRequestType & USB_TYPE_MASK) 2043 != USB_TYPE_STANDARD) 2044 break; 2045 2046 if ((setup->bRequestType & USB_RECIP_MASK) 2047 == USB_RECIP_ENDPOINT) { 2048 int pipe = wIndex & USB_ENDPOINT_NUMBER_MASK; 2049 struct qe_ep *ep; 2050 2051 if (wValue != 0 || wLength != 0 2052 || pipe >= USB_MAX_ENDPOINTS) 2053 break; 2054 ep = &udc->eps[pipe]; 2055 2056 spin_unlock(&udc->lock); 2057 qe_ep_set_halt(&ep->ep, 2058 (setup->bRequest == USB_REQ_SET_FEATURE) 2059 ? 1 : 0); 2060 spin_lock(&udc->lock); 2061 } 2062 2063 ep0_prime_status(udc, USB_DIR_IN); 2064 2065 return; 2066 2067 default: 2068 break; 2069 } 2070 2071 if (wLength) { 2072 /* Data phase from gadget, status phase from udc */ 2073 if (setup->bRequestType & USB_DIR_IN) { 2074 udc->ep0_state = DATA_STATE_XMIT; 2075 udc->ep0_dir = USB_DIR_IN; 2076 } else { 2077 udc->ep0_state = DATA_STATE_RECV; 2078 udc->ep0_dir = USB_DIR_OUT; 2079 } 2080 spin_unlock(&udc->lock); 2081 if (udc->driver->setup(&udc->gadget, 2082 &udc->local_setup_buff) < 0) 2083 qe_ep0_stall(udc); 2084 spin_lock(&udc->lock); 2085 } else { 2086 /* No data phase, IN status from gadget */ 2087 udc->ep0_dir = USB_DIR_IN; 2088 spin_unlock(&udc->lock); 2089 if (udc->driver->setup(&udc->gadget, 2090 &udc->local_setup_buff) < 0) 2091 qe_ep0_stall(udc); 2092 spin_lock(&udc->lock); 2093 udc->ep0_state = DATA_STATE_NEED_ZLP; 2094 } 2095 } 2096 2097 /*------------------------------------------------------------------------- 2098 USB Interrupt handlers 2099 -------------------------------------------------------------------------*/ 2100 static void suspend_irq(struct qe_udc *udc) 2101 { 2102 udc->resume_state = udc->usb_state; 2103 udc->usb_state = USB_STATE_SUSPENDED; 2104 2105 /* report suspend to the driver ,serial.c not support this*/ 2106 if (udc->driver->suspend) 2107 udc->driver->suspend(&udc->gadget); 2108 } 2109 2110 static void resume_irq(struct qe_udc *udc) 2111 { 2112 udc->usb_state = udc->resume_state; 2113 udc->resume_state = 0; 2114 2115 /* report resume to the driver , serial.c not support this*/ 2116 if (udc->driver->resume) 2117 udc->driver->resume(&udc->gadget); 2118 } 2119 2120 static void idle_irq(struct qe_udc *udc) 2121 { 2122 u8 usbs; 2123 2124 usbs = in_8(&udc->usb_regs->usb_usbs); 2125 if (usbs & USB_IDLE_STATUS_MASK) { 2126 if ((udc->usb_state) != USB_STATE_SUSPENDED) 2127 suspend_irq(udc); 2128 } else { 2129 if (udc->usb_state == USB_STATE_SUSPENDED) 2130 resume_irq(udc); 2131 } 2132 } 2133 2134 static int reset_irq(struct qe_udc *udc) 2135 { 2136 unsigned char i; 2137 2138 if (udc->usb_state == USB_STATE_DEFAULT) 2139 return 0; 2140 2141 qe_usb_disable(udc); 2142 out_8(&udc->usb_regs->usb_usadr, 0); 2143 2144 for (i = 0; i < USB_MAX_ENDPOINTS; i++) { 2145 if (udc->eps[i].init) 2146 qe_ep_reset(udc, i); 2147 } 2148 2149 reset_queues(udc); 2150 udc->usb_state = USB_STATE_DEFAULT; 2151 udc->ep0_state = WAIT_FOR_SETUP; 2152 udc->ep0_dir = USB_DIR_OUT; 2153 qe_usb_enable(udc); 2154 return 0; 2155 } 2156 2157 static int bsy_irq(struct qe_udc *udc) 2158 { 2159 return 0; 2160 } 2161 2162 static int txe_irq(struct qe_udc *udc) 2163 { 2164 return 0; 2165 } 2166 2167 /* ep0 tx interrupt also in here */ 2168 static int tx_irq(struct qe_udc *udc) 2169 { 2170 struct qe_ep *ep; 2171 struct qe_bd __iomem *bd; 2172 int i, res = 0; 2173 2174 if ((udc->usb_state == USB_STATE_ADDRESS) 2175 && (in_8(&udc->usb_regs->usb_usadr) == 0)) 2176 out_8(&udc->usb_regs->usb_usadr, udc->device_address); 2177 2178 for (i = (USB_MAX_ENDPOINTS-1); ((i >= 0) && (res == 0)); i--) { 2179 ep = &udc->eps[i]; 2180 if (ep && ep->init && (ep->dir != USB_DIR_OUT)) { 2181 bd = ep->c_txbd; 2182 if (!(in_be32((u32 __iomem *)bd) & T_R) 2183 && (in_be32(&bd->buf))) { 2184 /* confirm the transmitted bd */ 2185 if (ep->epnum == 0) 2186 res = qe_ep0_txconf(ep); 2187 else 2188 res = qe_ep_txconf(ep); 2189 } 2190 } 2191 } 2192 return res; 2193 } 2194 2195 2196 /* setup packect's rx is handle in the function too */ 2197 static void rx_irq(struct qe_udc *udc) 2198 { 2199 struct qe_ep *ep; 2200 struct qe_bd __iomem *bd; 2201 int i; 2202 2203 for (i = 0; i < USB_MAX_ENDPOINTS; i++) { 2204 ep = &udc->eps[i]; 2205 if (ep && ep->init && (ep->dir != USB_DIR_IN)) { 2206 bd = ep->n_rxbd; 2207 if (!(in_be32((u32 __iomem *)bd) & R_E) 2208 && (in_be32(&bd->buf))) { 2209 if (ep->epnum == 0) { 2210 qe_ep0_rx(udc); 2211 } else { 2212 /*non-setup package receive*/ 2213 qe_ep_rx(ep); 2214 } 2215 } 2216 } 2217 } 2218 } 2219 2220 static irqreturn_t qe_udc_irq(int irq, void *_udc) 2221 { 2222 struct qe_udc *udc = (struct qe_udc *)_udc; 2223 u16 irq_src; 2224 irqreturn_t status = IRQ_NONE; 2225 unsigned long flags; 2226 2227 spin_lock_irqsave(&udc->lock, flags); 2228 2229 irq_src = in_be16(&udc->usb_regs->usb_usber) & 2230 in_be16(&udc->usb_regs->usb_usbmr); 2231 /* Clear notification bits */ 2232 out_be16(&udc->usb_regs->usb_usber, irq_src); 2233 /* USB Interrupt */ 2234 if (irq_src & USB_E_IDLE_MASK) { 2235 idle_irq(udc); 2236 irq_src &= ~USB_E_IDLE_MASK; 2237 status = IRQ_HANDLED; 2238 } 2239 2240 if (irq_src & USB_E_TXB_MASK) { 2241 tx_irq(udc); 2242 irq_src &= ~USB_E_TXB_MASK; 2243 status = IRQ_HANDLED; 2244 } 2245 2246 if (irq_src & USB_E_RXB_MASK) { 2247 rx_irq(udc); 2248 irq_src &= ~USB_E_RXB_MASK; 2249 status = IRQ_HANDLED; 2250 } 2251 2252 if (irq_src & USB_E_RESET_MASK) { 2253 reset_irq(udc); 2254 irq_src &= ~USB_E_RESET_MASK; 2255 status = IRQ_HANDLED; 2256 } 2257 2258 if (irq_src & USB_E_BSY_MASK) { 2259 bsy_irq(udc); 2260 irq_src &= ~USB_E_BSY_MASK; 2261 status = IRQ_HANDLED; 2262 } 2263 2264 if (irq_src & USB_E_TXE_MASK) { 2265 txe_irq(udc); 2266 irq_src &= ~USB_E_TXE_MASK; 2267 status = IRQ_HANDLED; 2268 } 2269 2270 spin_unlock_irqrestore(&udc->lock, flags); 2271 2272 return status; 2273 } 2274 2275 /*------------------------------------------------------------------------- 2276 Gadget driver probe and unregister. 2277 --------------------------------------------------------------------------*/ 2278 static int fsl_qe_start(struct usb_gadget *gadget, 2279 struct usb_gadget_driver *driver) 2280 { 2281 struct qe_udc *udc; 2282 unsigned long flags; 2283 2284 udc = container_of(gadget, struct qe_udc, gadget); 2285 /* lock is needed but whether should use this lock or another */ 2286 spin_lock_irqsave(&udc->lock, flags); 2287 2288 driver->driver.bus = NULL; 2289 /* hook up the driver */ 2290 udc->driver = driver; 2291 udc->gadget.speed = driver->max_speed; 2292 2293 /* Enable IRQ reg and Set usbcmd reg EN bit */ 2294 qe_usb_enable(udc); 2295 2296 out_be16(&udc->usb_regs->usb_usber, 0xffff); 2297 out_be16(&udc->usb_regs->usb_usbmr, USB_E_DEFAULT_DEVICE); 2298 udc->usb_state = USB_STATE_ATTACHED; 2299 udc->ep0_state = WAIT_FOR_SETUP; 2300 udc->ep0_dir = USB_DIR_OUT; 2301 spin_unlock_irqrestore(&udc->lock, flags); 2302 2303 return 0; 2304 } 2305 2306 static int fsl_qe_stop(struct usb_gadget *gadget) 2307 { 2308 struct qe_udc *udc; 2309 struct qe_ep *loop_ep; 2310 unsigned long flags; 2311 2312 udc = container_of(gadget, struct qe_udc, gadget); 2313 /* stop usb controller, disable intr */ 2314 qe_usb_disable(udc); 2315 2316 /* in fact, no needed */ 2317 udc->usb_state = USB_STATE_ATTACHED; 2318 udc->ep0_state = WAIT_FOR_SETUP; 2319 udc->ep0_dir = 0; 2320 2321 /* stand operation */ 2322 spin_lock_irqsave(&udc->lock, flags); 2323 udc->gadget.speed = USB_SPEED_UNKNOWN; 2324 nuke(&udc->eps[0], -ESHUTDOWN); 2325 list_for_each_entry(loop_ep, &udc->gadget.ep_list, ep.ep_list) 2326 nuke(loop_ep, -ESHUTDOWN); 2327 spin_unlock_irqrestore(&udc->lock, flags); 2328 2329 udc->driver = NULL; 2330 2331 return 0; 2332 } 2333 2334 /* udc structure's alloc and setup, include ep-param alloc */ 2335 static struct qe_udc *qe_udc_config(struct platform_device *ofdev) 2336 { 2337 struct qe_udc *udc; 2338 struct device_node *np = ofdev->dev.of_node; 2339 unsigned long tmp_addr = 0; 2340 struct usb_device_para __iomem *usbpram; 2341 unsigned int i; 2342 u64 size; 2343 u32 offset; 2344 2345 udc = kzalloc(sizeof(*udc), GFP_KERNEL); 2346 if (!udc) 2347 goto cleanup; 2348 2349 udc->dev = &ofdev->dev; 2350 2351 /* get default address of usb parameter in MURAM from device tree */ 2352 offset = *of_get_address(np, 1, &size, NULL); 2353 udc->usb_param = cpm_muram_addr(offset); 2354 memset_io(udc->usb_param, 0, size); 2355 2356 usbpram = udc->usb_param; 2357 out_be16(&usbpram->frame_n, 0); 2358 out_be32(&usbpram->rstate, 0); 2359 2360 tmp_addr = cpm_muram_alloc((USB_MAX_ENDPOINTS * 2361 sizeof(struct usb_ep_para)), 2362 USB_EP_PARA_ALIGNMENT); 2363 if (IS_ERR_VALUE(tmp_addr)) 2364 goto cleanup; 2365 2366 for (i = 0; i < USB_MAX_ENDPOINTS; i++) { 2367 out_be16(&usbpram->epptr[i], (u16)tmp_addr); 2368 udc->ep_param[i] = cpm_muram_addr(tmp_addr); 2369 tmp_addr += 32; 2370 } 2371 2372 memset_io(udc->ep_param[0], 0, 2373 USB_MAX_ENDPOINTS * sizeof(struct usb_ep_para)); 2374 2375 udc->resume_state = USB_STATE_NOTATTACHED; 2376 udc->usb_state = USB_STATE_POWERED; 2377 udc->ep0_dir = 0; 2378 2379 spin_lock_init(&udc->lock); 2380 return udc; 2381 2382 cleanup: 2383 kfree(udc); 2384 return NULL; 2385 } 2386 2387 /* USB Controller register init */ 2388 static int qe_udc_reg_init(struct qe_udc *udc) 2389 { 2390 struct usb_ctlr __iomem *qe_usbregs; 2391 qe_usbregs = udc->usb_regs; 2392 2393 /* Spec says that we must enable the USB controller to change mode. */ 2394 out_8(&qe_usbregs->usb_usmod, 0x01); 2395 /* Mode changed, now disable it, since muram isn't initialized yet. */ 2396 out_8(&qe_usbregs->usb_usmod, 0x00); 2397 2398 /* Initialize the rest. */ 2399 out_be16(&qe_usbregs->usb_usbmr, 0); 2400 out_8(&qe_usbregs->usb_uscom, 0); 2401 out_be16(&qe_usbregs->usb_usber, USBER_ALL_CLEAR); 2402 2403 return 0; 2404 } 2405 2406 static int qe_ep_config(struct qe_udc *udc, unsigned char pipe_num) 2407 { 2408 struct qe_ep *ep = &udc->eps[pipe_num]; 2409 2410 ep->udc = udc; 2411 strcpy(ep->name, ep_name[pipe_num]); 2412 ep->ep.name = ep_name[pipe_num]; 2413 2414 if (pipe_num == 0) { 2415 ep->ep.caps.type_control = true; 2416 } else { 2417 ep->ep.caps.type_iso = true; 2418 ep->ep.caps.type_bulk = true; 2419 ep->ep.caps.type_int = true; 2420 } 2421 2422 ep->ep.caps.dir_in = true; 2423 ep->ep.caps.dir_out = true; 2424 2425 ep->ep.ops = &qe_ep_ops; 2426 ep->stopped = 1; 2427 usb_ep_set_maxpacket_limit(&ep->ep, (unsigned short) ~0); 2428 ep->ep.desc = NULL; 2429 ep->dir = 0xff; 2430 ep->epnum = (u8)pipe_num; 2431 ep->sent = 0; 2432 ep->last = 0; 2433 ep->init = 0; 2434 ep->rxframe = NULL; 2435 ep->txframe = NULL; 2436 ep->tx_req = NULL; 2437 ep->state = EP_STATE_IDLE; 2438 ep->has_data = 0; 2439 2440 /* the queue lists any req for this ep */ 2441 INIT_LIST_HEAD(&ep->queue); 2442 2443 /* gagdet.ep_list used for ep_autoconfig so no ep0*/ 2444 if (pipe_num != 0) 2445 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list); 2446 2447 ep->gadget = &udc->gadget; 2448 2449 return 0; 2450 } 2451 2452 /*----------------------------------------------------------------------- 2453 * UDC device Driver operation functions * 2454 *----------------------------------------------------------------------*/ 2455 static void qe_udc_release(struct device *dev) 2456 { 2457 struct qe_udc *udc = container_of(dev, struct qe_udc, gadget.dev); 2458 int i; 2459 2460 complete(udc->done); 2461 cpm_muram_free(cpm_muram_offset(udc->ep_param[0])); 2462 for (i = 0; i < USB_MAX_ENDPOINTS; i++) 2463 udc->ep_param[i] = NULL; 2464 2465 kfree(udc); 2466 } 2467 2468 /* Driver probe functions */ 2469 static const struct of_device_id qe_udc_match[]; 2470 static int qe_udc_probe(struct platform_device *ofdev) 2471 { 2472 struct qe_udc *udc; 2473 const struct of_device_id *match; 2474 struct device_node *np = ofdev->dev.of_node; 2475 struct qe_ep *ep; 2476 unsigned int ret = 0; 2477 unsigned int i; 2478 const void *prop; 2479 2480 match = of_match_device(qe_udc_match, &ofdev->dev); 2481 if (!match) 2482 return -EINVAL; 2483 2484 prop = of_get_property(np, "mode", NULL); 2485 if (!prop || strcmp(prop, "peripheral")) 2486 return -ENODEV; 2487 2488 /* Initialize the udc structure including QH member and other member */ 2489 udc = qe_udc_config(ofdev); 2490 if (!udc) { 2491 dev_err(&ofdev->dev, "failed to initialize\n"); 2492 return -ENOMEM; 2493 } 2494 2495 udc->soc_type = (unsigned long)match->data; 2496 udc->usb_regs = of_iomap(np, 0); 2497 if (!udc->usb_regs) { 2498 ret = -ENOMEM; 2499 goto err1; 2500 } 2501 2502 /* initialize usb hw reg except for regs for EP, 2503 * leave usbintr reg untouched*/ 2504 qe_udc_reg_init(udc); 2505 2506 /* here comes the stand operations for probe 2507 * set the qe_udc->gadget.xxx */ 2508 udc->gadget.ops = &qe_gadget_ops; 2509 2510 /* gadget.ep0 is a pointer */ 2511 udc->gadget.ep0 = &udc->eps[0].ep; 2512 2513 INIT_LIST_HEAD(&udc->gadget.ep_list); 2514 2515 /* modify in register gadget process */ 2516 udc->gadget.speed = USB_SPEED_UNKNOWN; 2517 2518 /* name: Identifies the controller hardware type. */ 2519 udc->gadget.name = driver_name; 2520 udc->gadget.dev.parent = &ofdev->dev; 2521 2522 /* initialize qe_ep struct */ 2523 for (i = 0; i < USB_MAX_ENDPOINTS ; i++) { 2524 /* because the ep type isn't decide here so 2525 * qe_ep_init() should be called in ep_enable() */ 2526 2527 /* setup the qe_ep struct and link ep.ep.list 2528 * into gadget.ep_list */ 2529 qe_ep_config(udc, (unsigned char)i); 2530 } 2531 2532 /* ep0 initialization in here */ 2533 ret = qe_ep_init(udc, 0, &qe_ep0_desc); 2534 if (ret) 2535 goto err2; 2536 2537 /* create a buf for ZLP send, need to remain zeroed */ 2538 udc->nullbuf = devm_kzalloc(&ofdev->dev, 256, GFP_KERNEL); 2539 if (udc->nullbuf == NULL) { 2540 ret = -ENOMEM; 2541 goto err3; 2542 } 2543 2544 /* buffer for data of get_status request */ 2545 udc->statusbuf = devm_kzalloc(&ofdev->dev, 2, GFP_KERNEL); 2546 if (udc->statusbuf == NULL) { 2547 ret = -ENOMEM; 2548 goto err3; 2549 } 2550 2551 udc->nullp = virt_to_phys((void *)udc->nullbuf); 2552 if (udc->nullp == DMA_ADDR_INVALID) { 2553 udc->nullp = dma_map_single( 2554 udc->gadget.dev.parent, 2555 udc->nullbuf, 2556 256, 2557 DMA_TO_DEVICE); 2558 udc->nullmap = 1; 2559 } else { 2560 dma_sync_single_for_device(udc->gadget.dev.parent, 2561 udc->nullp, 256, 2562 DMA_TO_DEVICE); 2563 } 2564 2565 tasklet_setup(&udc->rx_tasklet, ep_rx_tasklet); 2566 /* request irq and disable DR */ 2567 udc->usb_irq = irq_of_parse_and_map(np, 0); 2568 if (!udc->usb_irq) { 2569 ret = -EINVAL; 2570 goto err_noirq; 2571 } 2572 2573 ret = request_irq(udc->usb_irq, qe_udc_irq, 0, 2574 driver_name, udc); 2575 if (ret) { 2576 dev_err(udc->dev, "cannot request irq %d err %d\n", 2577 udc->usb_irq, ret); 2578 goto err4; 2579 } 2580 2581 ret = usb_add_gadget_udc_release(&ofdev->dev, &udc->gadget, 2582 qe_udc_release); 2583 if (ret) 2584 goto err5; 2585 2586 platform_set_drvdata(ofdev, udc); 2587 dev_info(udc->dev, 2588 "%s USB controller initialized as device\n", 2589 (udc->soc_type == PORT_QE) ? "QE" : "CPM"); 2590 return 0; 2591 2592 err5: 2593 free_irq(udc->usb_irq, udc); 2594 err4: 2595 irq_dispose_mapping(udc->usb_irq); 2596 err_noirq: 2597 if (udc->nullmap) { 2598 dma_unmap_single(udc->gadget.dev.parent, 2599 udc->nullp, 256, 2600 DMA_TO_DEVICE); 2601 udc->nullp = DMA_ADDR_INVALID; 2602 } else { 2603 dma_sync_single_for_cpu(udc->gadget.dev.parent, 2604 udc->nullp, 256, 2605 DMA_TO_DEVICE); 2606 } 2607 err3: 2608 ep = &udc->eps[0]; 2609 cpm_muram_free(cpm_muram_offset(ep->rxbase)); 2610 kfree(ep->rxframe); 2611 kfree(ep->rxbuffer); 2612 kfree(ep->txframe); 2613 err2: 2614 iounmap(udc->usb_regs); 2615 err1: 2616 kfree(udc); 2617 return ret; 2618 } 2619 2620 #ifdef CONFIG_PM 2621 static int qe_udc_suspend(struct platform_device *dev, pm_message_t state) 2622 { 2623 return -ENOTSUPP; 2624 } 2625 2626 static int qe_udc_resume(struct platform_device *dev) 2627 { 2628 return -ENOTSUPP; 2629 } 2630 #endif 2631 2632 static int qe_udc_remove(struct platform_device *ofdev) 2633 { 2634 struct qe_udc *udc = platform_get_drvdata(ofdev); 2635 struct qe_ep *ep; 2636 unsigned int size; 2637 DECLARE_COMPLETION_ONSTACK(done); 2638 2639 usb_del_gadget_udc(&udc->gadget); 2640 2641 udc->done = &done; 2642 tasklet_disable(&udc->rx_tasklet); 2643 2644 if (udc->nullmap) { 2645 dma_unmap_single(udc->gadget.dev.parent, 2646 udc->nullp, 256, 2647 DMA_TO_DEVICE); 2648 udc->nullp = DMA_ADDR_INVALID; 2649 } else { 2650 dma_sync_single_for_cpu(udc->gadget.dev.parent, 2651 udc->nullp, 256, 2652 DMA_TO_DEVICE); 2653 } 2654 2655 ep = &udc->eps[0]; 2656 cpm_muram_free(cpm_muram_offset(ep->rxbase)); 2657 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (USB_BDRING_LEN + 1); 2658 2659 kfree(ep->rxframe); 2660 if (ep->rxbufmap) { 2661 dma_unmap_single(udc->gadget.dev.parent, 2662 ep->rxbuf_d, size, 2663 DMA_FROM_DEVICE); 2664 ep->rxbuf_d = DMA_ADDR_INVALID; 2665 } else { 2666 dma_sync_single_for_cpu(udc->gadget.dev.parent, 2667 ep->rxbuf_d, size, 2668 DMA_FROM_DEVICE); 2669 } 2670 2671 kfree(ep->rxbuffer); 2672 kfree(ep->txframe); 2673 2674 free_irq(udc->usb_irq, udc); 2675 irq_dispose_mapping(udc->usb_irq); 2676 2677 tasklet_kill(&udc->rx_tasklet); 2678 2679 iounmap(udc->usb_regs); 2680 2681 /* wait for release() of gadget.dev to free udc */ 2682 wait_for_completion(&done); 2683 2684 return 0; 2685 } 2686 2687 /*-------------------------------------------------------------------------*/ 2688 static const struct of_device_id qe_udc_match[] = { 2689 { 2690 .compatible = "fsl,mpc8323-qe-usb", 2691 .data = (void *)PORT_QE, 2692 }, 2693 { 2694 .compatible = "fsl,mpc8360-qe-usb", 2695 .data = (void *)PORT_QE, 2696 }, 2697 { 2698 .compatible = "fsl,mpc8272-cpm-usb", 2699 .data = (void *)PORT_CPM, 2700 }, 2701 {}, 2702 }; 2703 2704 MODULE_DEVICE_TABLE(of, qe_udc_match); 2705 2706 static struct platform_driver udc_driver = { 2707 .driver = { 2708 .name = driver_name, 2709 .of_match_table = qe_udc_match, 2710 }, 2711 .probe = qe_udc_probe, 2712 .remove = qe_udc_remove, 2713 #ifdef CONFIG_PM 2714 .suspend = qe_udc_suspend, 2715 .resume = qe_udc_resume, 2716 #endif 2717 }; 2718 2719 module_platform_driver(udc_driver); 2720 2721 MODULE_DESCRIPTION(DRIVER_DESC); 2722 MODULE_AUTHOR(DRIVER_AUTHOR); 2723 MODULE_LICENSE("GPL"); 2724