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 49static const char driver_name[] = "fsl_qe_udc"; 50static const char driver_desc[] = DRIVER_DESC; 51 52/*ep name is important in gadget, it should obey the convention of ep_match()*/ 53static const char *const ep_name[] = { 54 "ep0-control", /* everyone has ep0 */ 55 /* 3 configurable endpoints */ 56 "ep1", 57 "ep2", 58 "ep3", 59}; 60 61static 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 *--------------------------------------------------------------*/ 76static 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 *--------------------------------------------------------------*/ 127static 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 */ 142static 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 159static 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 177static 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 186static 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 205static 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 226static 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 238static 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 250static 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 270static 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 279static 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 311static 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 341static int qe_ep_toggledata01(struct qe_ep *ep) 342{ 343 ep->data01 ^= 0x1; 344 return 0; 345} 346 347static 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 406static 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 467static 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 520static 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; 681en_done2: 682 kfree(ep->rxbuffer); 683 kfree(ep->rxframe); 684en_done1: 685 spin_unlock_irqrestore(&udc->lock, flags); 686en_done: 687 dev_err(udc->dev, "failed to initialize %s\n", ep->ep.name); 688 return -ENODEV; 689} 690 691static inline void qe_usb_enable(struct qe_udc *udc) 692{ 693 setbits8(&udc->usb_regs->usb_usmod, USB_MODE_EN); 694} 695 696static 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 ******************************************************************************/ 709static 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 723static 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 750static 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 785static void setup_received_handle(struct qe_udc *udc, 786 struct usb_ctrlrequest *setup); 787static int qe_ep_rxframe_handle(struct qe_ep *ep); 788static void ep0_req_complete(struct qe_udc *udc, struct qe_req *req); 789/* when BD PID is setup, handle the packet */ 790static 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 814static 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 887static 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 932static 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 1020static 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 */ 1066static 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 */ 1138static 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 */ 1188static 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 */ 1210static 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 1226static 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 */ 1245static 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 */ 1263static 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 1303static 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 1341static 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 1360static 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 1397static 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 */ 1416static 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 */ 1455static 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 */ 1469static 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 */ 1559static 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 -----------------------------------------------------------------------*/ 1581static 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 1612static 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 1668static 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 1683static 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 1693static 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 */ 1761static 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 */ 1776static 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*----------------------------------------------------------------*/ 1813static 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; 1848out: 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 1855static 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 */ 1873static 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 1884static int fsl_qe_start(struct usb_gadget *gadget, 1885 struct usb_gadget_driver *driver); 1886static int fsl_qe_stop(struct usb_gadget *gadget); 1887 1888/* defined in usb_gadget.h */ 1889static 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 -------------------------------------------------------------------------*/ 1898static 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 1907static 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 1922static 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 1935static 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 1943static 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 if (pipe >= USB_MAX_ENDPOINTS) 1963 goto stall; 1964 struct qe_ep *target_ep = &udc->eps[pipe]; 1965 u16 usep; 1966 1967 /* stall if endpoint doesn't exist */ 1968 if (!target_ep->ep.desc) 1969 goto stall; 1970 1971 usep = in_be16(&udc->usb_regs->usb_usep[pipe]); 1972 if (index & USB_DIR_IN) { 1973 if (target_ep->dir != USB_DIR_IN) 1974 goto stall; 1975 if ((usep & USB_THS_MASK) == USB_THS_STALL) 1976 usb_status = 1 << USB_ENDPOINT_HALT; 1977 } else { 1978 if (target_ep->dir != USB_DIR_OUT) 1979 goto stall; 1980 if ((usep & USB_RHS_MASK) == USB_RHS_STALL) 1981 usb_status = 1 << USB_ENDPOINT_HALT; 1982 } 1983 } 1984 1985 req = container_of(qe_alloc_request(&ep->ep, GFP_KERNEL), 1986 struct qe_req, req); 1987 req->req.length = 2; 1988 req->req.buf = udc->statusbuf; 1989 *(u16 *)req->req.buf = cpu_to_le16(usb_status); 1990 req->req.status = -EINPROGRESS; 1991 req->req.actual = 0; 1992 req->req.complete = ownercomplete; 1993 1994 udc->ep0_dir = USB_DIR_IN; 1995 1996 /* data phase */ 1997 status = __qe_ep_queue(&ep->ep, &req->req); 1998 1999 if (status == 0) 2000 return; 2001stall: 2002 dev_err(udc->dev, "Can't respond to getstatus request \n"); 2003 qe_ep0_stall(udc); 2004} 2005 2006/* only handle the setup request, suppose the device in normal status */ 2007static void setup_received_handle(struct qe_udc *udc, 2008 struct usb_ctrlrequest *setup) 2009{ 2010 /* Fix Endian (udc->local_setup_buff is cpu Endian now)*/ 2011 u16 wValue = le16_to_cpu(setup->wValue); 2012 u16 wIndex = le16_to_cpu(setup->wIndex); 2013 u16 wLength = le16_to_cpu(setup->wLength); 2014 2015 /* clear the previous request in the ep0 */ 2016 udc_reset_ep_queue(udc, 0); 2017 2018 if (setup->bRequestType & USB_DIR_IN) 2019 udc->ep0_dir = USB_DIR_IN; 2020 else 2021 udc->ep0_dir = USB_DIR_OUT; 2022 2023 switch (setup->bRequest) { 2024 case USB_REQ_GET_STATUS: 2025 /* Data+Status phase form udc */ 2026 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK)) 2027 != (USB_DIR_IN | USB_TYPE_STANDARD)) 2028 break; 2029 ch9getstatus(udc, setup->bRequestType, wValue, wIndex, 2030 wLength); 2031 return; 2032 2033 case USB_REQ_SET_ADDRESS: 2034 /* Status phase from udc */ 2035 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD | 2036 USB_RECIP_DEVICE)) 2037 break; 2038 ch9setaddress(udc, wValue, wIndex, wLength); 2039 return; 2040 2041 case USB_REQ_CLEAR_FEATURE: 2042 case USB_REQ_SET_FEATURE: 2043 /* Requests with no data phase, status phase from udc */ 2044 if ((setup->bRequestType & USB_TYPE_MASK) 2045 != USB_TYPE_STANDARD) 2046 break; 2047 2048 if ((setup->bRequestType & USB_RECIP_MASK) 2049 == USB_RECIP_ENDPOINT) { 2050 int pipe = wIndex & USB_ENDPOINT_NUMBER_MASK; 2051 struct qe_ep *ep; 2052 2053 if (wValue != 0 || wLength != 0 2054 || pipe >= USB_MAX_ENDPOINTS) 2055 break; 2056 ep = &udc->eps[pipe]; 2057 2058 spin_unlock(&udc->lock); 2059 qe_ep_set_halt(&ep->ep, 2060 (setup->bRequest == USB_REQ_SET_FEATURE) 2061 ? 1 : 0); 2062 spin_lock(&udc->lock); 2063 } 2064 2065 ep0_prime_status(udc, USB_DIR_IN); 2066 2067 return; 2068 2069 default: 2070 break; 2071 } 2072 2073 if (wLength) { 2074 /* Data phase from gadget, status phase from udc */ 2075 if (setup->bRequestType & USB_DIR_IN) { 2076 udc->ep0_state = DATA_STATE_XMIT; 2077 udc->ep0_dir = USB_DIR_IN; 2078 } else { 2079 udc->ep0_state = DATA_STATE_RECV; 2080 udc->ep0_dir = USB_DIR_OUT; 2081 } 2082 spin_unlock(&udc->lock); 2083 if (udc->driver->setup(&udc->gadget, 2084 &udc->local_setup_buff) < 0) 2085 qe_ep0_stall(udc); 2086 spin_lock(&udc->lock); 2087 } else { 2088 /* No data phase, IN status from gadget */ 2089 udc->ep0_dir = USB_DIR_IN; 2090 spin_unlock(&udc->lock); 2091 if (udc->driver->setup(&udc->gadget, 2092 &udc->local_setup_buff) < 0) 2093 qe_ep0_stall(udc); 2094 spin_lock(&udc->lock); 2095 udc->ep0_state = DATA_STATE_NEED_ZLP; 2096 } 2097} 2098 2099/*------------------------------------------------------------------------- 2100 USB Interrupt handlers 2101 -------------------------------------------------------------------------*/ 2102static void suspend_irq(struct qe_udc *udc) 2103{ 2104 udc->resume_state = udc->usb_state; 2105 udc->usb_state = USB_STATE_SUSPENDED; 2106 2107 /* report suspend to the driver ,serial.c not support this*/ 2108 if (udc->driver->suspend) 2109 udc->driver->suspend(&udc->gadget); 2110} 2111 2112static void resume_irq(struct qe_udc *udc) 2113{ 2114 udc->usb_state = udc->resume_state; 2115 udc->resume_state = 0; 2116 2117 /* report resume to the driver , serial.c not support this*/ 2118 if (udc->driver->resume) 2119 udc->driver->resume(&udc->gadget); 2120} 2121 2122static void idle_irq(struct qe_udc *udc) 2123{ 2124 u8 usbs; 2125 2126 usbs = in_8(&udc->usb_regs->usb_usbs); 2127 if (usbs & USB_IDLE_STATUS_MASK) { 2128 if ((udc->usb_state) != USB_STATE_SUSPENDED) 2129 suspend_irq(udc); 2130 } else { 2131 if (udc->usb_state == USB_STATE_SUSPENDED) 2132 resume_irq(udc); 2133 } 2134} 2135 2136static int reset_irq(struct qe_udc *udc) 2137{ 2138 unsigned char i; 2139 2140 if (udc->usb_state == USB_STATE_DEFAULT) 2141 return 0; 2142 2143 qe_usb_disable(udc); 2144 out_8(&udc->usb_regs->usb_usadr, 0); 2145 2146 for (i = 0; i < USB_MAX_ENDPOINTS; i++) { 2147 if (udc->eps[i].init) 2148 qe_ep_reset(udc, i); 2149 } 2150 2151 reset_queues(udc); 2152 udc->usb_state = USB_STATE_DEFAULT; 2153 udc->ep0_state = WAIT_FOR_SETUP; 2154 udc->ep0_dir = USB_DIR_OUT; 2155 qe_usb_enable(udc); 2156 return 0; 2157} 2158 2159static int bsy_irq(struct qe_udc *udc) 2160{ 2161 return 0; 2162} 2163 2164static int txe_irq(struct qe_udc *udc) 2165{ 2166 return 0; 2167} 2168 2169/* ep0 tx interrupt also in here */ 2170static int tx_irq(struct qe_udc *udc) 2171{ 2172 struct qe_ep *ep; 2173 struct qe_bd __iomem *bd; 2174 int i, res = 0; 2175 2176 if ((udc->usb_state == USB_STATE_ADDRESS) 2177 && (in_8(&udc->usb_regs->usb_usadr) == 0)) 2178 out_8(&udc->usb_regs->usb_usadr, udc->device_address); 2179 2180 for (i = (USB_MAX_ENDPOINTS-1); ((i >= 0) && (res == 0)); i--) { 2181 ep = &udc->eps[i]; 2182 if (ep && ep->init && (ep->dir != USB_DIR_OUT)) { 2183 bd = ep->c_txbd; 2184 if (!(in_be32((u32 __iomem *)bd) & T_R) 2185 && (in_be32(&bd->buf))) { 2186 /* confirm the transmitted bd */ 2187 if (ep->epnum == 0) 2188 res = qe_ep0_txconf(ep); 2189 else 2190 res = qe_ep_txconf(ep); 2191 } 2192 } 2193 } 2194 return res; 2195} 2196 2197 2198/* setup packect's rx is handle in the function too */ 2199static void rx_irq(struct qe_udc *udc) 2200{ 2201 struct qe_ep *ep; 2202 struct qe_bd __iomem *bd; 2203 int i; 2204 2205 for (i = 0; i < USB_MAX_ENDPOINTS; i++) { 2206 ep = &udc->eps[i]; 2207 if (ep && ep->init && (ep->dir != USB_DIR_IN)) { 2208 bd = ep->n_rxbd; 2209 if (!(in_be32((u32 __iomem *)bd) & R_E) 2210 && (in_be32(&bd->buf))) { 2211 if (ep->epnum == 0) { 2212 qe_ep0_rx(udc); 2213 } else { 2214 /*non-setup package receive*/ 2215 qe_ep_rx(ep); 2216 } 2217 } 2218 } 2219 } 2220} 2221 2222static irqreturn_t qe_udc_irq(int irq, void *_udc) 2223{ 2224 struct qe_udc *udc = (struct qe_udc *)_udc; 2225 u16 irq_src; 2226 irqreturn_t status = IRQ_NONE; 2227 unsigned long flags; 2228 2229 spin_lock_irqsave(&udc->lock, flags); 2230 2231 irq_src = in_be16(&udc->usb_regs->usb_usber) & 2232 in_be16(&udc->usb_regs->usb_usbmr); 2233 /* Clear notification bits */ 2234 out_be16(&udc->usb_regs->usb_usber, irq_src); 2235 /* USB Interrupt */ 2236 if (irq_src & USB_E_IDLE_MASK) { 2237 idle_irq(udc); 2238 irq_src &= ~USB_E_IDLE_MASK; 2239 status = IRQ_HANDLED; 2240 } 2241 2242 if (irq_src & USB_E_TXB_MASK) { 2243 tx_irq(udc); 2244 irq_src &= ~USB_E_TXB_MASK; 2245 status = IRQ_HANDLED; 2246 } 2247 2248 if (irq_src & USB_E_RXB_MASK) { 2249 rx_irq(udc); 2250 irq_src &= ~USB_E_RXB_MASK; 2251 status = IRQ_HANDLED; 2252 } 2253 2254 if (irq_src & USB_E_RESET_MASK) { 2255 reset_irq(udc); 2256 irq_src &= ~USB_E_RESET_MASK; 2257 status = IRQ_HANDLED; 2258 } 2259 2260 if (irq_src & USB_E_BSY_MASK) { 2261 bsy_irq(udc); 2262 irq_src &= ~USB_E_BSY_MASK; 2263 status = IRQ_HANDLED; 2264 } 2265 2266 if (irq_src & USB_E_TXE_MASK) { 2267 txe_irq(udc); 2268 irq_src &= ~USB_E_TXE_MASK; 2269 status = IRQ_HANDLED; 2270 } 2271 2272 spin_unlock_irqrestore(&udc->lock, flags); 2273 2274 return status; 2275} 2276 2277/*------------------------------------------------------------------------- 2278 Gadget driver probe and unregister. 2279 --------------------------------------------------------------------------*/ 2280static int fsl_qe_start(struct usb_gadget *gadget, 2281 struct usb_gadget_driver *driver) 2282{ 2283 struct qe_udc *udc; 2284 unsigned long flags; 2285 2286 udc = container_of(gadget, struct qe_udc, gadget); 2287 /* lock is needed but whether should use this lock or another */ 2288 spin_lock_irqsave(&udc->lock, flags); 2289 2290 /* hook up the driver */ 2291 udc->driver = driver; 2292 udc->gadget.speed = driver->max_speed; 2293 2294 /* Enable IRQ reg and Set usbcmd reg EN bit */ 2295 qe_usb_enable(udc); 2296 2297 out_be16(&udc->usb_regs->usb_usber, 0xffff); 2298 out_be16(&udc->usb_regs->usb_usbmr, USB_E_DEFAULT_DEVICE); 2299 udc->usb_state = USB_STATE_ATTACHED; 2300 udc->ep0_state = WAIT_FOR_SETUP; 2301 udc->ep0_dir = USB_DIR_OUT; 2302 spin_unlock_irqrestore(&udc->lock, flags); 2303 2304 return 0; 2305} 2306 2307static int fsl_qe_stop(struct usb_gadget *gadget) 2308{ 2309 struct qe_udc *udc; 2310 struct qe_ep *loop_ep; 2311 unsigned long flags; 2312 2313 udc = container_of(gadget, struct qe_udc, gadget); 2314 /* stop usb controller, disable intr */ 2315 qe_usb_disable(udc); 2316 2317 /* in fact, no needed */ 2318 udc->usb_state = USB_STATE_ATTACHED; 2319 udc->ep0_state = WAIT_FOR_SETUP; 2320 udc->ep0_dir = 0; 2321 2322 /* stand operation */ 2323 spin_lock_irqsave(&udc->lock, flags); 2324 udc->gadget.speed = USB_SPEED_UNKNOWN; 2325 nuke(&udc->eps[0], -ESHUTDOWN); 2326 list_for_each_entry(loop_ep, &udc->gadget.ep_list, ep.ep_list) 2327 nuke(loop_ep, -ESHUTDOWN); 2328 spin_unlock_irqrestore(&udc->lock, flags); 2329 2330 udc->driver = NULL; 2331 2332 return 0; 2333} 2334 2335/* udc structure's alloc and setup, include ep-param alloc */ 2336static struct qe_udc *qe_udc_config(struct platform_device *ofdev) 2337{ 2338 struct qe_udc *udc; 2339 struct device_node *np = ofdev->dev.of_node; 2340 unsigned long tmp_addr = 0; 2341 struct usb_device_para __iomem *usbpram; 2342 unsigned int i; 2343 u64 size; 2344 u32 offset; 2345 2346 udc = kzalloc(sizeof(*udc), GFP_KERNEL); 2347 if (!udc) 2348 goto cleanup; 2349 2350 udc->dev = &ofdev->dev; 2351 2352 /* get default address of usb parameter in MURAM from device tree */ 2353 offset = *of_get_address(np, 1, &size, NULL); 2354 udc->usb_param = cpm_muram_addr(offset); 2355 memset_io(udc->usb_param, 0, size); 2356 2357 usbpram = udc->usb_param; 2358 out_be16(&usbpram->frame_n, 0); 2359 out_be32(&usbpram->rstate, 0); 2360 2361 tmp_addr = cpm_muram_alloc((USB_MAX_ENDPOINTS * 2362 sizeof(struct usb_ep_para)), 2363 USB_EP_PARA_ALIGNMENT); 2364 if (IS_ERR_VALUE(tmp_addr)) 2365 goto cleanup; 2366 2367 for (i = 0; i < USB_MAX_ENDPOINTS; i++) { 2368 out_be16(&usbpram->epptr[i], (u16)tmp_addr); 2369 udc->ep_param[i] = cpm_muram_addr(tmp_addr); 2370 tmp_addr += 32; 2371 } 2372 2373 memset_io(udc->ep_param[0], 0, 2374 USB_MAX_ENDPOINTS * sizeof(struct usb_ep_para)); 2375 2376 udc->resume_state = USB_STATE_NOTATTACHED; 2377 udc->usb_state = USB_STATE_POWERED; 2378 udc->ep0_dir = 0; 2379 2380 spin_lock_init(&udc->lock); 2381 return udc; 2382 2383cleanup: 2384 kfree(udc); 2385 return NULL; 2386} 2387 2388/* USB Controller register init */ 2389static int qe_udc_reg_init(struct qe_udc *udc) 2390{ 2391 struct usb_ctlr __iomem *qe_usbregs; 2392 qe_usbregs = udc->usb_regs; 2393 2394 /* Spec says that we must enable the USB controller to change mode. */ 2395 out_8(&qe_usbregs->usb_usmod, 0x01); 2396 /* Mode changed, now disable it, since muram isn't initialized yet. */ 2397 out_8(&qe_usbregs->usb_usmod, 0x00); 2398 2399 /* Initialize the rest. */ 2400 out_be16(&qe_usbregs->usb_usbmr, 0); 2401 out_8(&qe_usbregs->usb_uscom, 0); 2402 out_be16(&qe_usbregs->usb_usber, USBER_ALL_CLEAR); 2403 2404 return 0; 2405} 2406 2407static int qe_ep_config(struct qe_udc *udc, unsigned char pipe_num) 2408{ 2409 struct qe_ep *ep = &udc->eps[pipe_num]; 2410 2411 ep->udc = udc; 2412 strcpy(ep->name, ep_name[pipe_num]); 2413 ep->ep.name = ep_name[pipe_num]; 2414 2415 if (pipe_num == 0) { 2416 ep->ep.caps.type_control = true; 2417 } else { 2418 ep->ep.caps.type_iso = true; 2419 ep->ep.caps.type_bulk = true; 2420 ep->ep.caps.type_int = true; 2421 } 2422 2423 ep->ep.caps.dir_in = true; 2424 ep->ep.caps.dir_out = true; 2425 2426 ep->ep.ops = &qe_ep_ops; 2427 ep->stopped = 1; 2428 usb_ep_set_maxpacket_limit(&ep->ep, (unsigned short) ~0); 2429 ep->ep.desc = NULL; 2430 ep->dir = 0xff; 2431 ep->epnum = (u8)pipe_num; 2432 ep->sent = 0; 2433 ep->last = 0; 2434 ep->init = 0; 2435 ep->rxframe = NULL; 2436 ep->txframe = NULL; 2437 ep->tx_req = NULL; 2438 ep->state = EP_STATE_IDLE; 2439 ep->has_data = 0; 2440 2441 /* the queue lists any req for this ep */ 2442 INIT_LIST_HEAD(&ep->queue); 2443 2444 /* gagdet.ep_list used for ep_autoconfig so no ep0*/ 2445 if (pipe_num != 0) 2446 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list); 2447 2448 ep->gadget = &udc->gadget; 2449 2450 return 0; 2451} 2452 2453/*----------------------------------------------------------------------- 2454 * UDC device Driver operation functions * 2455 *----------------------------------------------------------------------*/ 2456static void qe_udc_release(struct device *dev) 2457{ 2458 struct qe_udc *udc = container_of(dev, struct qe_udc, gadget.dev); 2459 int i; 2460 2461 complete(udc->done); 2462 cpm_muram_free(cpm_muram_offset(udc->ep_param[0])); 2463 for (i = 0; i < USB_MAX_ENDPOINTS; i++) 2464 udc->ep_param[i] = NULL; 2465 2466 kfree(udc); 2467} 2468 2469/* Driver probe functions */ 2470static const struct of_device_id qe_udc_match[]; 2471static int qe_udc_probe(struct platform_device *ofdev) 2472{ 2473 struct qe_udc *udc; 2474 const struct of_device_id *match; 2475 struct device_node *np = ofdev->dev.of_node; 2476 struct qe_ep *ep; 2477 unsigned int ret = 0; 2478 unsigned int i; 2479 const void *prop; 2480 2481 match = of_match_device(qe_udc_match, &ofdev->dev); 2482 if (!match) 2483 return -EINVAL; 2484 2485 prop = of_get_property(np, "mode", NULL); 2486 if (!prop || strcmp(prop, "peripheral")) 2487 return -ENODEV; 2488 2489 /* Initialize the udc structure including QH member and other member */ 2490 udc = qe_udc_config(ofdev); 2491 if (!udc) { 2492 dev_err(&ofdev->dev, "failed to initialize\n"); 2493 return -ENOMEM; 2494 } 2495 2496 udc->soc_type = (unsigned long)match->data; 2497 udc->usb_regs = of_iomap(np, 0); 2498 if (!udc->usb_regs) { 2499 ret = -ENOMEM; 2500 goto err1; 2501 } 2502 2503 /* initialize usb hw reg except for regs for EP, 2504 * leave usbintr reg untouched*/ 2505 qe_udc_reg_init(udc); 2506 2507 /* here comes the stand operations for probe 2508 * set the qe_udc->gadget.xxx */ 2509 udc->gadget.ops = &qe_gadget_ops; 2510 2511 /* gadget.ep0 is a pointer */ 2512 udc->gadget.ep0 = &udc->eps[0].ep; 2513 2514 INIT_LIST_HEAD(&udc->gadget.ep_list); 2515 2516 /* modify in register gadget process */ 2517 udc->gadget.speed = USB_SPEED_UNKNOWN; 2518 2519 /* name: Identifies the controller hardware type. */ 2520 udc->gadget.name = driver_name; 2521 udc->gadget.dev.parent = &ofdev->dev; 2522 2523 /* initialize qe_ep struct */ 2524 for (i = 0; i < USB_MAX_ENDPOINTS ; i++) { 2525 /* because the ep type isn't decide here so 2526 * qe_ep_init() should be called in ep_enable() */ 2527 2528 /* setup the qe_ep struct and link ep.ep.list 2529 * into gadget.ep_list */ 2530 qe_ep_config(udc, (unsigned char)i); 2531 } 2532 2533 /* ep0 initialization in here */ 2534 ret = qe_ep_init(udc, 0, &qe_ep0_desc); 2535 if (ret) 2536 goto err2; 2537 2538 /* create a buf for ZLP send, need to remain zeroed */ 2539 udc->nullbuf = devm_kzalloc(&ofdev->dev, 256, GFP_KERNEL); 2540 if (udc->nullbuf == NULL) { 2541 ret = -ENOMEM; 2542 goto err3; 2543 } 2544 2545 /* buffer for data of get_status request */ 2546 udc->statusbuf = devm_kzalloc(&ofdev->dev, 2, GFP_KERNEL); 2547 if (udc->statusbuf == NULL) { 2548 ret = -ENOMEM; 2549 goto err3; 2550 } 2551 2552 udc->nullp = virt_to_phys((void *)udc->nullbuf); 2553 if (udc->nullp == DMA_ADDR_INVALID) { 2554 udc->nullp = dma_map_single( 2555 udc->gadget.dev.parent, 2556 udc->nullbuf, 2557 256, 2558 DMA_TO_DEVICE); 2559 udc->nullmap = 1; 2560 } else { 2561 dma_sync_single_for_device(udc->gadget.dev.parent, 2562 udc->nullp, 256, 2563 DMA_TO_DEVICE); 2564 } 2565 2566 tasklet_setup(&udc->rx_tasklet, ep_rx_tasklet); 2567 /* request irq and disable DR */ 2568 udc->usb_irq = irq_of_parse_and_map(np, 0); 2569 if (!udc->usb_irq) { 2570 ret = -EINVAL; 2571 goto err_noirq; 2572 } 2573 2574 ret = request_irq(udc->usb_irq, qe_udc_irq, 0, 2575 driver_name, udc); 2576 if (ret) { 2577 dev_err(udc->dev, "cannot request irq %d err %d\n", 2578 udc->usb_irq, ret); 2579 goto err4; 2580 } 2581 2582 ret = usb_add_gadget_udc_release(&ofdev->dev, &udc->gadget, 2583 qe_udc_release); 2584 if (ret) 2585 goto err5; 2586 2587 platform_set_drvdata(ofdev, udc); 2588 dev_info(udc->dev, 2589 "%s USB controller initialized as device\n", 2590 (udc->soc_type == PORT_QE) ? "QE" : "CPM"); 2591 return 0; 2592 2593err5: 2594 free_irq(udc->usb_irq, udc); 2595err4: 2596 irq_dispose_mapping(udc->usb_irq); 2597err_noirq: 2598 if (udc->nullmap) { 2599 dma_unmap_single(udc->gadget.dev.parent, 2600 udc->nullp, 256, 2601 DMA_TO_DEVICE); 2602 udc->nullp = DMA_ADDR_INVALID; 2603 } else { 2604 dma_sync_single_for_cpu(udc->gadget.dev.parent, 2605 udc->nullp, 256, 2606 DMA_TO_DEVICE); 2607 } 2608err3: 2609 ep = &udc->eps[0]; 2610 cpm_muram_free(cpm_muram_offset(ep->rxbase)); 2611 kfree(ep->rxframe); 2612 kfree(ep->rxbuffer); 2613 kfree(ep->txframe); 2614err2: 2615 iounmap(udc->usb_regs); 2616err1: 2617 kfree(udc); 2618 return ret; 2619} 2620 2621#ifdef CONFIG_PM 2622static int qe_udc_suspend(struct platform_device *dev, pm_message_t state) 2623{ 2624 return -ENOTSUPP; 2625} 2626 2627static int qe_udc_resume(struct platform_device *dev) 2628{ 2629 return -ENOTSUPP; 2630} 2631#endif 2632 2633static void qe_udc_remove(struct platform_device *ofdev) 2634{ 2635 struct qe_udc *udc = platform_get_drvdata(ofdev); 2636 struct qe_ep *ep; 2637 unsigned int size; 2638 DECLARE_COMPLETION_ONSTACK(done); 2639 2640 usb_del_gadget_udc(&udc->gadget); 2641 2642 udc->done = &done; 2643 tasklet_disable(&udc->rx_tasklet); 2644 2645 if (udc->nullmap) { 2646 dma_unmap_single(udc->gadget.dev.parent, 2647 udc->nullp, 256, 2648 DMA_TO_DEVICE); 2649 udc->nullp = DMA_ADDR_INVALID; 2650 } else { 2651 dma_sync_single_for_cpu(udc->gadget.dev.parent, 2652 udc->nullp, 256, 2653 DMA_TO_DEVICE); 2654 } 2655 2656 ep = &udc->eps[0]; 2657 cpm_muram_free(cpm_muram_offset(ep->rxbase)); 2658 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (USB_BDRING_LEN + 1); 2659 2660 kfree(ep->rxframe); 2661 if (ep->rxbufmap) { 2662 dma_unmap_single(udc->gadget.dev.parent, 2663 ep->rxbuf_d, size, 2664 DMA_FROM_DEVICE); 2665 ep->rxbuf_d = DMA_ADDR_INVALID; 2666 } else { 2667 dma_sync_single_for_cpu(udc->gadget.dev.parent, 2668 ep->rxbuf_d, size, 2669 DMA_FROM_DEVICE); 2670 } 2671 2672 kfree(ep->rxbuffer); 2673 kfree(ep->txframe); 2674 2675 free_irq(udc->usb_irq, udc); 2676 irq_dispose_mapping(udc->usb_irq); 2677 2678 tasklet_kill(&udc->rx_tasklet); 2679 2680 iounmap(udc->usb_regs); 2681 2682 /* wait for release() of gadget.dev to free udc */ 2683 wait_for_completion(&done); 2684} 2685 2686/*-------------------------------------------------------------------------*/ 2687static const struct of_device_id qe_udc_match[] = { 2688 { 2689 .compatible = "fsl,mpc8323-qe-usb", 2690 .data = (void *)PORT_QE, 2691 }, 2692 { 2693 .compatible = "fsl,mpc8360-qe-usb", 2694 .data = (void *)PORT_QE, 2695 }, 2696 { 2697 .compatible = "fsl,mpc8272-cpm-usb", 2698 .data = (void *)PORT_CPM, 2699 }, 2700 {}, 2701}; 2702 2703MODULE_DEVICE_TABLE(of, qe_udc_match); 2704 2705static struct platform_driver udc_driver = { 2706 .driver = { 2707 .name = driver_name, 2708 .of_match_table = qe_udc_match, 2709 }, 2710 .probe = qe_udc_probe, 2711 .remove_new = qe_udc_remove, 2712#ifdef CONFIG_PM 2713 .suspend = qe_udc_suspend, 2714 .resume = qe_udc_resume, 2715#endif 2716}; 2717 2718module_platform_driver(udc_driver); 2719 2720MODULE_DESCRIPTION(DRIVER_DESC); 2721MODULE_AUTHOR(DRIVER_AUTHOR); 2722MODULE_LICENSE("GPL"); 2723