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