1/* 2 * Renesas USB driver 3 * 4 * Copyright (C) 2011 Renesas Solutions Corp. 5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> 6 * 7 * This program is distributed in the hope that it will be useful, 8 * but WITHOUT ANY WARRANTY; without even the implied warranty of 9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 * GNU General Public License for more details. 11 * 12 * You should have received a copy of the GNU General Public License 13 * along with this program; if not, write to the Free Software 14 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 15 * 16 */ 17#include <linux/delay.h> 18#include <linux/io.h> 19#include <linux/scatterlist.h> 20#include "./common.h" 21#include "./pipe.h" 22 23#define usbhsf_get_cfifo(p) (&((p)->fifo_info.cfifo)) 24#define usbhsf_get_d0fifo(p) (&((p)->fifo_info.d0fifo)) 25#define usbhsf_get_d1fifo(p) (&((p)->fifo_info.d1fifo)) 26#define usbhsf_is_cfifo(p, f) (usbhsf_get_cfifo(p) == f) 27 28#define usbhsf_fifo_is_busy(f) ((f)->pipe) /* see usbhs_pipe_select_fifo */ 29 30/* 31 * packet initialize 32 */ 33void usbhs_pkt_init(struct usbhs_pkt *pkt) 34{ 35 pkt->dma = DMA_ADDR_INVALID; 36 INIT_LIST_HEAD(&pkt->node); 37} 38 39/* 40 * packet control function 41 */ 42static int usbhsf_null_handle(struct usbhs_pkt *pkt, int *is_done) 43{ 44 struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe); 45 struct device *dev = usbhs_priv_to_dev(priv); 46 47 dev_err(dev, "null handler\n"); 48 49 return -EINVAL; 50} 51 52static struct usbhs_pkt_handle usbhsf_null_handler = { 53 .prepare = usbhsf_null_handle, 54 .try_run = usbhsf_null_handle, 55}; 56 57void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt, 58 void (*done)(struct usbhs_priv *priv, 59 struct usbhs_pkt *pkt), 60 void *buf, int len, int zero, int sequence) 61{ 62 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); 63 struct device *dev = usbhs_priv_to_dev(priv); 64 unsigned long flags; 65 66 if (!done) { 67 dev_err(dev, "no done function\n"); 68 return; 69 } 70 71 /******************** spin lock ********************/ 72 usbhs_lock(priv, flags); 73 74 if (!pipe->handler) { 75 dev_err(dev, "no handler function\n"); 76 pipe->handler = &usbhsf_null_handler; 77 } 78 79 list_move_tail(&pkt->node, &pipe->list); 80 81 /* 82 * each pkt must hold own handler. 83 * because handler might be changed by its situation. 84 * dma handler -> pio handler. 85 */ 86 pkt->pipe = pipe; 87 pkt->buf = buf; 88 pkt->handler = pipe->handler; 89 pkt->length = len; 90 pkt->zero = zero; 91 pkt->actual = 0; 92 pkt->done = done; 93 pkt->sequence = sequence; 94 95 usbhs_unlock(priv, flags); 96 /******************** spin unlock ******************/ 97} 98 99static void __usbhsf_pkt_del(struct usbhs_pkt *pkt) 100{ 101 list_del_init(&pkt->node); 102} 103 104static struct usbhs_pkt *__usbhsf_pkt_get(struct usbhs_pipe *pipe) 105{ 106 if (list_empty(&pipe->list)) 107 return NULL; 108 109 return list_first_entry(&pipe->list, struct usbhs_pkt, node); 110} 111 112struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt) 113{ 114 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); 115 unsigned long flags; 116 117 /******************** spin lock ********************/ 118 usbhs_lock(priv, flags); 119 120 if (!pkt) 121 pkt = __usbhsf_pkt_get(pipe); 122 123 if (pkt) 124 __usbhsf_pkt_del(pkt); 125 126 usbhs_unlock(priv, flags); 127 /******************** spin unlock ******************/ 128 129 return pkt; 130} 131 132enum { 133 USBHSF_PKT_PREPARE, 134 USBHSF_PKT_TRY_RUN, 135 USBHSF_PKT_DMA_DONE, 136}; 137 138static int usbhsf_pkt_handler(struct usbhs_pipe *pipe, int type) 139{ 140 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); 141 struct usbhs_pkt *pkt; 142 struct device *dev = usbhs_priv_to_dev(priv); 143 int (*func)(struct usbhs_pkt *pkt, int *is_done); 144 unsigned long flags; 145 int ret = 0; 146 int is_done = 0; 147 148 /******************** spin lock ********************/ 149 usbhs_lock(priv, flags); 150 151 pkt = __usbhsf_pkt_get(pipe); 152 if (!pkt) 153 goto __usbhs_pkt_handler_end; 154 155 switch (type) { 156 case USBHSF_PKT_PREPARE: 157 func = pkt->handler->prepare; 158 break; 159 case USBHSF_PKT_TRY_RUN: 160 func = pkt->handler->try_run; 161 break; 162 case USBHSF_PKT_DMA_DONE: 163 func = pkt->handler->dma_done; 164 break; 165 default: 166 dev_err(dev, "unknown pkt hander\n"); 167 goto __usbhs_pkt_handler_end; 168 } 169 170 ret = func(pkt, &is_done); 171 172 if (is_done) 173 __usbhsf_pkt_del(pkt); 174 175__usbhs_pkt_handler_end: 176 usbhs_unlock(priv, flags); 177 /******************** spin unlock ******************/ 178 179 if (is_done) { 180 pkt->done(priv, pkt); 181 usbhs_pkt_start(pipe); 182 } 183 184 return ret; 185} 186 187void usbhs_pkt_start(struct usbhs_pipe *pipe) 188{ 189 usbhsf_pkt_handler(pipe, USBHSF_PKT_PREPARE); 190} 191 192/* 193 * irq enable/disable function 194 */ 195#define usbhsf_irq_empty_ctrl(p, e) usbhsf_irq_callback_ctrl(p, bempsts, e) 196#define usbhsf_irq_ready_ctrl(p, e) usbhsf_irq_callback_ctrl(p, brdysts, e) 197#define usbhsf_irq_callback_ctrl(pipe, status, enable) \ 198 ({ \ 199 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); \ 200 struct usbhs_mod *mod = usbhs_mod_get_current(priv); \ 201 u16 status = (1 << usbhs_pipe_number(pipe)); \ 202 if (!mod) \ 203 return; \ 204 if (enable) \ 205 mod->irq_##status |= status; \ 206 else \ 207 mod->irq_##status &= ~status; \ 208 usbhs_irq_callback_update(priv, mod); \ 209 }) 210 211static void usbhsf_tx_irq_ctrl(struct usbhs_pipe *pipe, int enable) 212{ 213 /* 214 * And DCP pipe can NOT use "ready interrupt" for "send" 215 * it should use "empty" interrupt. 216 * see 217 * "Operation" - "Interrupt Function" - "BRDY Interrupt" 218 * 219 * on the other hand, normal pipe can use "ready interrupt" for "send" 220 * even though it is single/double buffer 221 */ 222 if (usbhs_pipe_is_dcp(pipe)) 223 usbhsf_irq_empty_ctrl(pipe, enable); 224 else 225 usbhsf_irq_ready_ctrl(pipe, enable); 226} 227 228static void usbhsf_rx_irq_ctrl(struct usbhs_pipe *pipe, int enable) 229{ 230 usbhsf_irq_ready_ctrl(pipe, enable); 231} 232 233/* 234 * FIFO ctrl 235 */ 236static void usbhsf_send_terminator(struct usbhs_pipe *pipe, 237 struct usbhs_fifo *fifo) 238{ 239 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); 240 241 usbhs_bset(priv, fifo->ctr, BVAL, BVAL); 242} 243 244static int usbhsf_fifo_barrier(struct usbhs_priv *priv, 245 struct usbhs_fifo *fifo) 246{ 247 int timeout = 1024; 248 249 do { 250 /* The FIFO port is accessible */ 251 if (usbhs_read(priv, fifo->ctr) & FRDY) 252 return 0; 253 254 udelay(10); 255 } while (timeout--); 256 257 return -EBUSY; 258} 259 260static void usbhsf_fifo_clear(struct usbhs_pipe *pipe, 261 struct usbhs_fifo *fifo) 262{ 263 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); 264 265 if (!usbhs_pipe_is_dcp(pipe)) 266 usbhsf_fifo_barrier(priv, fifo); 267 268 usbhs_write(priv, fifo->ctr, BCLR); 269} 270 271static int usbhsf_fifo_rcv_len(struct usbhs_priv *priv, 272 struct usbhs_fifo *fifo) 273{ 274 return usbhs_read(priv, fifo->ctr) & DTLN_MASK; 275} 276 277static void usbhsf_fifo_unselect(struct usbhs_pipe *pipe, 278 struct usbhs_fifo *fifo) 279{ 280 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); 281 282 usbhs_pipe_select_fifo(pipe, NULL); 283 usbhs_write(priv, fifo->sel, 0); 284} 285 286static int usbhsf_fifo_select(struct usbhs_pipe *pipe, 287 struct usbhs_fifo *fifo, 288 int write) 289{ 290 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); 291 struct device *dev = usbhs_priv_to_dev(priv); 292 int timeout = 1024; 293 u16 mask = ((1 << 5) | 0xF); /* mask of ISEL | CURPIPE */ 294 u16 base = usbhs_pipe_number(pipe); /* CURPIPE */ 295 296 if (usbhs_pipe_is_busy(pipe) || 297 usbhsf_fifo_is_busy(fifo)) 298 return -EBUSY; 299 300 if (usbhs_pipe_is_dcp(pipe)) { 301 base |= (1 == write) << 5; /* ISEL */ 302 303 if (usbhs_mod_is_host(priv)) 304 usbhs_dcp_dir_for_host(pipe, write); 305 } 306 307 /* "base" will be used below */ 308 if (usbhs_get_dparam(priv, has_sudmac) && !usbhsf_is_cfifo(priv, fifo)) 309 usbhs_write(priv, fifo->sel, base); 310 else 311 usbhs_write(priv, fifo->sel, base | MBW_32); 312 313 /* check ISEL and CURPIPE value */ 314 while (timeout--) { 315 if (base == (mask & usbhs_read(priv, fifo->sel))) { 316 usbhs_pipe_select_fifo(pipe, fifo); 317 return 0; 318 } 319 udelay(10); 320 } 321 322 dev_err(dev, "fifo select error\n"); 323 324 return -EIO; 325} 326 327/* 328 * DCP status stage 329 */ 330static int usbhs_dcp_dir_switch_to_write(struct usbhs_pkt *pkt, int *is_done) 331{ 332 struct usbhs_pipe *pipe = pkt->pipe; 333 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); 334 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ 335 struct device *dev = usbhs_priv_to_dev(priv); 336 int ret; 337 338 usbhs_pipe_disable(pipe); 339 340 ret = usbhsf_fifo_select(pipe, fifo, 1); 341 if (ret < 0) { 342 dev_err(dev, "%s() faile\n", __func__); 343 return ret; 344 } 345 346 usbhs_pipe_sequence_data1(pipe); /* DATA1 */ 347 348 usbhsf_fifo_clear(pipe, fifo); 349 usbhsf_send_terminator(pipe, fifo); 350 351 usbhsf_fifo_unselect(pipe, fifo); 352 353 usbhsf_tx_irq_ctrl(pipe, 1); 354 usbhs_pipe_enable(pipe); 355 356 return ret; 357} 358 359static int usbhs_dcp_dir_switch_to_read(struct usbhs_pkt *pkt, int *is_done) 360{ 361 struct usbhs_pipe *pipe = pkt->pipe; 362 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); 363 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ 364 struct device *dev = usbhs_priv_to_dev(priv); 365 int ret; 366 367 usbhs_pipe_disable(pipe); 368 369 ret = usbhsf_fifo_select(pipe, fifo, 0); 370 if (ret < 0) { 371 dev_err(dev, "%s() fail\n", __func__); 372 return ret; 373 } 374 375 usbhs_pipe_sequence_data1(pipe); /* DATA1 */ 376 usbhsf_fifo_clear(pipe, fifo); 377 378 usbhsf_fifo_unselect(pipe, fifo); 379 380 usbhsf_rx_irq_ctrl(pipe, 1); 381 usbhs_pipe_enable(pipe); 382 383 return ret; 384 385} 386 387static int usbhs_dcp_dir_switch_done(struct usbhs_pkt *pkt, int *is_done) 388{ 389 struct usbhs_pipe *pipe = pkt->pipe; 390 391 if (pkt->handler == &usbhs_dcp_status_stage_in_handler) 392 usbhsf_tx_irq_ctrl(pipe, 0); 393 else 394 usbhsf_rx_irq_ctrl(pipe, 0); 395 396 pkt->actual = pkt->length; 397 *is_done = 1; 398 399 return 0; 400} 401 402struct usbhs_pkt_handle usbhs_dcp_status_stage_in_handler = { 403 .prepare = usbhs_dcp_dir_switch_to_write, 404 .try_run = usbhs_dcp_dir_switch_done, 405}; 406 407struct usbhs_pkt_handle usbhs_dcp_status_stage_out_handler = { 408 .prepare = usbhs_dcp_dir_switch_to_read, 409 .try_run = usbhs_dcp_dir_switch_done, 410}; 411 412/* 413 * DCP data stage (push) 414 */ 415static int usbhsf_dcp_data_stage_try_push(struct usbhs_pkt *pkt, int *is_done) 416{ 417 struct usbhs_pipe *pipe = pkt->pipe; 418 419 usbhs_pipe_sequence_data1(pipe); /* DATA1 */ 420 421 /* 422 * change handler to PIO push 423 */ 424 pkt->handler = &usbhs_fifo_pio_push_handler; 425 426 return pkt->handler->prepare(pkt, is_done); 427} 428 429struct usbhs_pkt_handle usbhs_dcp_data_stage_out_handler = { 430 .prepare = usbhsf_dcp_data_stage_try_push, 431}; 432 433/* 434 * DCP data stage (pop) 435 */ 436static int usbhsf_dcp_data_stage_prepare_pop(struct usbhs_pkt *pkt, 437 int *is_done) 438{ 439 struct usbhs_pipe *pipe = pkt->pipe; 440 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); 441 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); 442 443 if (usbhs_pipe_is_busy(pipe)) 444 return 0; 445 446 /* 447 * prepare pop for DCP should 448 * - change DCP direction, 449 * - clear fifo 450 * - DATA1 451 */ 452 usbhs_pipe_disable(pipe); 453 454 usbhs_pipe_sequence_data1(pipe); /* DATA1 */ 455 456 usbhsf_fifo_select(pipe, fifo, 0); 457 usbhsf_fifo_clear(pipe, fifo); 458 usbhsf_fifo_unselect(pipe, fifo); 459 460 /* 461 * change handler to PIO pop 462 */ 463 pkt->handler = &usbhs_fifo_pio_pop_handler; 464 465 return pkt->handler->prepare(pkt, is_done); 466} 467 468struct usbhs_pkt_handle usbhs_dcp_data_stage_in_handler = { 469 .prepare = usbhsf_dcp_data_stage_prepare_pop, 470}; 471 472/* 473 * PIO push handler 474 */ 475static int usbhsf_pio_try_push(struct usbhs_pkt *pkt, int *is_done) 476{ 477 struct usbhs_pipe *pipe = pkt->pipe; 478 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); 479 struct device *dev = usbhs_priv_to_dev(priv); 480 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ 481 void __iomem *addr = priv->base + fifo->port; 482 u8 *buf; 483 int maxp = usbhs_pipe_get_maxpacket(pipe); 484 int total_len; 485 int i, ret, len; 486 int is_short; 487 488 usbhs_pipe_data_sequence(pipe, pkt->sequence); 489 pkt->sequence = -1; /* -1 sequence will be ignored */ 490 491 ret = usbhsf_fifo_select(pipe, fifo, 1); 492 if (ret < 0) 493 return 0; 494 495 ret = usbhs_pipe_is_accessible(pipe); 496 if (ret < 0) { 497 /* inaccessible pipe is not an error */ 498 ret = 0; 499 goto usbhs_fifo_write_busy; 500 } 501 502 ret = usbhsf_fifo_barrier(priv, fifo); 503 if (ret < 0) 504 goto usbhs_fifo_write_busy; 505 506 buf = pkt->buf + pkt->actual; 507 len = pkt->length - pkt->actual; 508 len = min(len, maxp); 509 total_len = len; 510 is_short = total_len < maxp; 511 512 /* 513 * FIXME 514 * 515 * 32-bit access only 516 */ 517 if (len >= 4 && !((unsigned long)buf & 0x03)) { 518 iowrite32_rep(addr, buf, len / 4); 519 len %= 4; 520 buf += total_len - len; 521 } 522 523 /* the rest operation */ 524 for (i = 0; i < len; i++) 525 iowrite8(buf[i], addr + (0x03 - (i & 0x03))); 526 527 /* 528 * variable update 529 */ 530 pkt->actual += total_len; 531 532 if (pkt->actual < pkt->length) 533 *is_done = 0; /* there are remainder data */ 534 else if (is_short) 535 *is_done = 1; /* short packet */ 536 else 537 *is_done = !pkt->zero; /* send zero packet ? */ 538 539 /* 540 * pipe/irq handling 541 */ 542 if (is_short) 543 usbhsf_send_terminator(pipe, fifo); 544 545 usbhsf_tx_irq_ctrl(pipe, !*is_done); 546 usbhs_pipe_enable(pipe); 547 548 dev_dbg(dev, " send %d (%d/ %d/ %d/ %d)\n", 549 usbhs_pipe_number(pipe), 550 pkt->length, pkt->actual, *is_done, pkt->zero); 551 552 /* 553 * Transmission end 554 */ 555 if (*is_done) { 556 if (usbhs_pipe_is_dcp(pipe)) 557 usbhs_dcp_control_transfer_done(pipe); 558 } 559 560 usbhsf_fifo_unselect(pipe, fifo); 561 562 return 0; 563 564usbhs_fifo_write_busy: 565 usbhsf_fifo_unselect(pipe, fifo); 566 567 /* 568 * pipe is busy. 569 * retry in interrupt 570 */ 571 usbhsf_tx_irq_ctrl(pipe, 1); 572 573 return ret; 574} 575 576struct usbhs_pkt_handle usbhs_fifo_pio_push_handler = { 577 .prepare = usbhsf_pio_try_push, 578 .try_run = usbhsf_pio_try_push, 579}; 580 581/* 582 * PIO pop handler 583 */ 584static int usbhsf_prepare_pop(struct usbhs_pkt *pkt, int *is_done) 585{ 586 struct usbhs_pipe *pipe = pkt->pipe; 587 588 if (usbhs_pipe_is_busy(pipe)) 589 return 0; 590 591 /* 592 * pipe enable to prepare packet receive 593 */ 594 usbhs_pipe_data_sequence(pipe, pkt->sequence); 595 pkt->sequence = -1; /* -1 sequence will be ignored */ 596 597 usbhs_pipe_enable(pipe); 598 usbhsf_rx_irq_ctrl(pipe, 1); 599 600 return 0; 601} 602 603static int usbhsf_pio_try_pop(struct usbhs_pkt *pkt, int *is_done) 604{ 605 struct usbhs_pipe *pipe = pkt->pipe; 606 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); 607 struct device *dev = usbhs_priv_to_dev(priv); 608 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ 609 void __iomem *addr = priv->base + fifo->port; 610 u8 *buf; 611 u32 data = 0; 612 int maxp = usbhs_pipe_get_maxpacket(pipe); 613 int rcv_len, len; 614 int i, ret; 615 int total_len = 0; 616 617 ret = usbhsf_fifo_select(pipe, fifo, 0); 618 if (ret < 0) 619 return 0; 620 621 ret = usbhsf_fifo_barrier(priv, fifo); 622 if (ret < 0) 623 goto usbhs_fifo_read_busy; 624 625 rcv_len = usbhsf_fifo_rcv_len(priv, fifo); 626 627 buf = pkt->buf + pkt->actual; 628 len = pkt->length - pkt->actual; 629 len = min(len, rcv_len); 630 total_len = len; 631 632 /* 633 * update actual length first here to decide disable pipe. 634 * if this pipe keeps BUF status and all data were popped, 635 * then, next interrupt/token will be issued again 636 */ 637 pkt->actual += total_len; 638 639 if ((pkt->actual == pkt->length) || /* receive all data */ 640 (total_len < maxp)) { /* short packet */ 641 *is_done = 1; 642 usbhsf_rx_irq_ctrl(pipe, 0); 643 usbhs_pipe_disable(pipe); /* disable pipe first */ 644 } 645 646 /* 647 * Buffer clear if Zero-Length packet 648 * 649 * see 650 * "Operation" - "FIFO Buffer Memory" - "FIFO Port Function" 651 */ 652 if (0 == rcv_len) { 653 pkt->zero = 1; 654 usbhsf_fifo_clear(pipe, fifo); 655 goto usbhs_fifo_read_end; 656 } 657 658 /* 659 * FIXME 660 * 661 * 32-bit access only 662 */ 663 if (len >= 4 && !((unsigned long)buf & 0x03)) { 664 ioread32_rep(addr, buf, len / 4); 665 len %= 4; 666 buf += total_len - len; 667 } 668 669 /* the rest operation */ 670 for (i = 0; i < len; i++) { 671 if (!(i & 0x03)) 672 data = ioread32(addr); 673 674 buf[i] = (data >> ((i & 0x03) * 8)) & 0xff; 675 } 676 677usbhs_fifo_read_end: 678 dev_dbg(dev, " recv %d (%d/ %d/ %d/ %d)\n", 679 usbhs_pipe_number(pipe), 680 pkt->length, pkt->actual, *is_done, pkt->zero); 681 682usbhs_fifo_read_busy: 683 usbhsf_fifo_unselect(pipe, fifo); 684 685 return ret; 686} 687 688struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler = { 689 .prepare = usbhsf_prepare_pop, 690 .try_run = usbhsf_pio_try_pop, 691}; 692 693/* 694 * DCP ctrol statge handler 695 */ 696static int usbhsf_ctrl_stage_end(struct usbhs_pkt *pkt, int *is_done) 697{ 698 usbhs_dcp_control_transfer_done(pkt->pipe); 699 700 *is_done = 1; 701 702 return 0; 703} 704 705struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler = { 706 .prepare = usbhsf_ctrl_stage_end, 707 .try_run = usbhsf_ctrl_stage_end, 708}; 709 710/* 711 * DMA fifo functions 712 */ 713static struct dma_chan *usbhsf_dma_chan_get(struct usbhs_fifo *fifo, 714 struct usbhs_pkt *pkt) 715{ 716 if (&usbhs_fifo_dma_push_handler == pkt->handler) 717 return fifo->tx_chan; 718 719 if (&usbhs_fifo_dma_pop_handler == pkt->handler) 720 return fifo->rx_chan; 721 722 return NULL; 723} 724 725static struct usbhs_fifo *usbhsf_get_dma_fifo(struct usbhs_priv *priv, 726 struct usbhs_pkt *pkt) 727{ 728 struct usbhs_fifo *fifo; 729 730 /* DMA :: D0FIFO */ 731 fifo = usbhsf_get_d0fifo(priv); 732 if (usbhsf_dma_chan_get(fifo, pkt) && 733 !usbhsf_fifo_is_busy(fifo)) 734 return fifo; 735 736 /* DMA :: D1FIFO */ 737 fifo = usbhsf_get_d1fifo(priv); 738 if (usbhsf_dma_chan_get(fifo, pkt) && 739 !usbhsf_fifo_is_busy(fifo)) 740 return fifo; 741 742 return NULL; 743} 744 745#define usbhsf_dma_start(p, f) __usbhsf_dma_ctrl(p, f, DREQE) 746#define usbhsf_dma_stop(p, f) __usbhsf_dma_ctrl(p, f, 0) 747static void __usbhsf_dma_ctrl(struct usbhs_pipe *pipe, 748 struct usbhs_fifo *fifo, 749 u16 dreqe) 750{ 751 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); 752 753 usbhs_bset(priv, fifo->sel, DREQE, dreqe); 754} 755 756#define usbhsf_dma_map(p) __usbhsf_dma_map_ctrl(p, 1) 757#define usbhsf_dma_unmap(p) __usbhsf_dma_map_ctrl(p, 0) 758static int __usbhsf_dma_map_ctrl(struct usbhs_pkt *pkt, int map) 759{ 760 struct usbhs_pipe *pipe = pkt->pipe; 761 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); 762 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv); 763 764 return info->dma_map_ctrl(pkt, map); 765} 766 767static void usbhsf_dma_complete(void *arg); 768static void xfer_work(struct work_struct *work) 769{ 770 struct usbhs_pkt *pkt = container_of(work, struct usbhs_pkt, work); 771 struct usbhs_pipe *pipe = pkt->pipe; 772 struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe); 773 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); 774 struct scatterlist sg; 775 struct dma_async_tx_descriptor *desc; 776 struct dma_chan *chan = usbhsf_dma_chan_get(fifo, pkt); 777 struct device *dev = usbhs_priv_to_dev(priv); 778 enum dma_transfer_direction dir; 779 dma_cookie_t cookie; 780 781 dir = usbhs_pipe_is_dir_in(pipe) ? DMA_DEV_TO_MEM : DMA_MEM_TO_DEV; 782 783 sg_init_table(&sg, 1); 784 sg_set_page(&sg, virt_to_page(pkt->dma), 785 pkt->length, offset_in_page(pkt->dma)); 786 sg_dma_address(&sg) = pkt->dma + pkt->actual; 787 sg_dma_len(&sg) = pkt->trans; 788 789 desc = dmaengine_prep_slave_sg(chan, &sg, 1, dir, 790 DMA_PREP_INTERRUPT | DMA_CTRL_ACK); 791 if (!desc) 792 return; 793 794 desc->callback = usbhsf_dma_complete; 795 desc->callback_param = pipe; 796 797 cookie = desc->tx_submit(desc); 798 if (cookie < 0) { 799 dev_err(dev, "Failed to submit dma descriptor\n"); 800 return; 801 } 802 803 dev_dbg(dev, " %s %d (%d/ %d)\n", 804 fifo->name, usbhs_pipe_number(pipe), pkt->length, pkt->zero); 805 806 usbhsf_dma_start(pipe, fifo); 807 dma_async_issue_pending(chan); 808} 809 810/* 811 * DMA push handler 812 */ 813static int usbhsf_dma_prepare_push(struct usbhs_pkt *pkt, int *is_done) 814{ 815 struct usbhs_pipe *pipe = pkt->pipe; 816 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); 817 struct usbhs_fifo *fifo; 818 int len = pkt->length - pkt->actual; 819 int ret; 820 821 if (usbhs_pipe_is_busy(pipe)) 822 return 0; 823 824 /* use PIO if packet is less than pio_dma_border or pipe is DCP */ 825 if ((len < usbhs_get_dparam(priv, pio_dma_border)) || 826 usbhs_pipe_is_dcp(pipe)) 827 goto usbhsf_pio_prepare_push; 828 829 if (len % 4) /* 32bit alignment */ 830 goto usbhsf_pio_prepare_push; 831 832 if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */ 833 goto usbhsf_pio_prepare_push; 834 835 /* get enable DMA fifo */ 836 fifo = usbhsf_get_dma_fifo(priv, pkt); 837 if (!fifo) 838 goto usbhsf_pio_prepare_push; 839 840 if (usbhsf_dma_map(pkt) < 0) 841 goto usbhsf_pio_prepare_push; 842 843 ret = usbhsf_fifo_select(pipe, fifo, 0); 844 if (ret < 0) 845 goto usbhsf_pio_prepare_push_unmap; 846 847 pkt->trans = len; 848 849 INIT_WORK(&pkt->work, xfer_work); 850 schedule_work(&pkt->work); 851 852 return 0; 853 854usbhsf_pio_prepare_push_unmap: 855 usbhsf_dma_unmap(pkt); 856usbhsf_pio_prepare_push: 857 /* 858 * change handler to PIO 859 */ 860 pkt->handler = &usbhs_fifo_pio_push_handler; 861 862 return pkt->handler->prepare(pkt, is_done); 863} 864 865static int usbhsf_dma_push_done(struct usbhs_pkt *pkt, int *is_done) 866{ 867 struct usbhs_pipe *pipe = pkt->pipe; 868 869 pkt->actual = pkt->trans; 870 871 *is_done = !pkt->zero; /* send zero packet ? */ 872 873 usbhsf_dma_stop(pipe, pipe->fifo); 874 usbhsf_dma_unmap(pkt); 875 usbhsf_fifo_unselect(pipe, pipe->fifo); 876 877 return 0; 878} 879 880struct usbhs_pkt_handle usbhs_fifo_dma_push_handler = { 881 .prepare = usbhsf_dma_prepare_push, 882 .dma_done = usbhsf_dma_push_done, 883}; 884 885/* 886 * DMA pop handler 887 */ 888static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done) 889{ 890 struct usbhs_pipe *pipe = pkt->pipe; 891 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); 892 struct usbhs_fifo *fifo; 893 int len, ret; 894 895 if (usbhs_pipe_is_busy(pipe)) 896 return 0; 897 898 if (usbhs_pipe_is_dcp(pipe)) 899 goto usbhsf_pio_prepare_pop; 900 901 /* get enable DMA fifo */ 902 fifo = usbhsf_get_dma_fifo(priv, pkt); 903 if (!fifo) 904 goto usbhsf_pio_prepare_pop; 905 906 if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */ 907 goto usbhsf_pio_prepare_pop; 908 909 ret = usbhsf_fifo_select(pipe, fifo, 0); 910 if (ret < 0) 911 goto usbhsf_pio_prepare_pop; 912 913 /* use PIO if packet is less than pio_dma_border */ 914 len = usbhsf_fifo_rcv_len(priv, fifo); 915 len = min(pkt->length - pkt->actual, len); 916 if (len % 4) /* 32bit alignment */ 917 goto usbhsf_pio_prepare_pop_unselect; 918 919 if (len < usbhs_get_dparam(priv, pio_dma_border)) 920 goto usbhsf_pio_prepare_pop_unselect; 921 922 ret = usbhsf_fifo_barrier(priv, fifo); 923 if (ret < 0) 924 goto usbhsf_pio_prepare_pop_unselect; 925 926 if (usbhsf_dma_map(pkt) < 0) 927 goto usbhsf_pio_prepare_pop_unselect; 928 929 /* DMA */ 930 931 /* 932 * usbhs_fifo_dma_pop_handler :: prepare 933 * enabled irq to come here. 934 * but it is no longer needed for DMA. disable it. 935 */ 936 usbhsf_rx_irq_ctrl(pipe, 0); 937 938 pkt->trans = len; 939 940 INIT_WORK(&pkt->work, xfer_work); 941 schedule_work(&pkt->work); 942 943 return 0; 944 945usbhsf_pio_prepare_pop_unselect: 946 usbhsf_fifo_unselect(pipe, fifo); 947usbhsf_pio_prepare_pop: 948 949 /* 950 * change handler to PIO 951 */ 952 pkt->handler = &usbhs_fifo_pio_pop_handler; 953 954 return pkt->handler->try_run(pkt, is_done); 955} 956 957static int usbhsf_dma_pop_done(struct usbhs_pkt *pkt, int *is_done) 958{ 959 struct usbhs_pipe *pipe = pkt->pipe; 960 int maxp = usbhs_pipe_get_maxpacket(pipe); 961 962 usbhsf_dma_stop(pipe, pipe->fifo); 963 usbhsf_dma_unmap(pkt); 964 usbhsf_fifo_unselect(pipe, pipe->fifo); 965 966 pkt->actual += pkt->trans; 967 968 if ((pkt->actual == pkt->length) || /* receive all data */ 969 (pkt->trans < maxp)) { /* short packet */ 970 *is_done = 1; 971 } else { 972 /* re-enable */ 973 usbhsf_prepare_pop(pkt, is_done); 974 } 975 976 return 0; 977} 978 979struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler = { 980 .prepare = usbhsf_prepare_pop, 981 .try_run = usbhsf_dma_try_pop, 982 .dma_done = usbhsf_dma_pop_done 983}; 984 985/* 986 * DMA setting 987 */ 988static bool usbhsf_dma_filter(struct dma_chan *chan, void *param) 989{ 990 struct sh_dmae_slave *slave = param; 991 992 /* 993 * FIXME 994 * 995 * usbhs doesn't recognize id = 0 as valid DMA 996 */ 997 if (0 == slave->slave_id) 998 return false; 999 1000 chan->private = slave; 1001 1002 return true; 1003} 1004 1005static void usbhsf_dma_quit(struct usbhs_priv *priv, struct usbhs_fifo *fifo) 1006{ 1007 if (fifo->tx_chan) 1008 dma_release_channel(fifo->tx_chan); 1009 if (fifo->rx_chan) 1010 dma_release_channel(fifo->rx_chan); 1011 1012 fifo->tx_chan = NULL; 1013 fifo->rx_chan = NULL; 1014} 1015 1016static void usbhsf_dma_init(struct usbhs_priv *priv, 1017 struct usbhs_fifo *fifo) 1018{ 1019 struct device *dev = usbhs_priv_to_dev(priv); 1020 dma_cap_mask_t mask; 1021 1022 dma_cap_zero(mask); 1023 dma_cap_set(DMA_SLAVE, mask); 1024 fifo->tx_chan = dma_request_channel(mask, usbhsf_dma_filter, 1025 &fifo->tx_slave); 1026 1027 dma_cap_zero(mask); 1028 dma_cap_set(DMA_SLAVE, mask); 1029 fifo->rx_chan = dma_request_channel(mask, usbhsf_dma_filter, 1030 &fifo->rx_slave); 1031 1032 if (fifo->tx_chan || fifo->rx_chan) 1033 dev_dbg(dev, "enable DMAEngine (%s%s%s)\n", 1034 fifo->name, 1035 fifo->tx_chan ? "[TX]" : " ", 1036 fifo->rx_chan ? "[RX]" : " "); 1037} 1038 1039/* 1040 * irq functions 1041 */ 1042static int usbhsf_irq_empty(struct usbhs_priv *priv, 1043 struct usbhs_irq_state *irq_state) 1044{ 1045 struct usbhs_pipe *pipe; 1046 struct device *dev = usbhs_priv_to_dev(priv); 1047 int i, ret; 1048 1049 if (!irq_state->bempsts) { 1050 dev_err(dev, "debug %s !!\n", __func__); 1051 return -EIO; 1052 } 1053 1054 dev_dbg(dev, "irq empty [0x%04x]\n", irq_state->bempsts); 1055 1056 /* 1057 * search interrupted "pipe" 1058 * not "uep". 1059 */ 1060 usbhs_for_each_pipe_with_dcp(pipe, priv, i) { 1061 if (!(irq_state->bempsts & (1 << i))) 1062 continue; 1063 1064 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN); 1065 if (ret < 0) 1066 dev_err(dev, "irq_empty run_error %d : %d\n", i, ret); 1067 } 1068 1069 return 0; 1070} 1071 1072static int usbhsf_irq_ready(struct usbhs_priv *priv, 1073 struct usbhs_irq_state *irq_state) 1074{ 1075 struct usbhs_pipe *pipe; 1076 struct device *dev = usbhs_priv_to_dev(priv); 1077 int i, ret; 1078 1079 if (!irq_state->brdysts) { 1080 dev_err(dev, "debug %s !!\n", __func__); 1081 return -EIO; 1082 } 1083 1084 dev_dbg(dev, "irq ready [0x%04x]\n", irq_state->brdysts); 1085 1086 /* 1087 * search interrupted "pipe" 1088 * not "uep". 1089 */ 1090 usbhs_for_each_pipe_with_dcp(pipe, priv, i) { 1091 if (!(irq_state->brdysts & (1 << i))) 1092 continue; 1093 1094 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN); 1095 if (ret < 0) 1096 dev_err(dev, "irq_ready run_error %d : %d\n", i, ret); 1097 } 1098 1099 return 0; 1100} 1101 1102static void usbhsf_dma_complete(void *arg) 1103{ 1104 struct usbhs_pipe *pipe = arg; 1105 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); 1106 struct device *dev = usbhs_priv_to_dev(priv); 1107 int ret; 1108 1109 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_DMA_DONE); 1110 if (ret < 0) 1111 dev_err(dev, "dma_complete run_error %d : %d\n", 1112 usbhs_pipe_number(pipe), ret); 1113} 1114 1115/* 1116 * fifo init 1117 */ 1118void usbhs_fifo_init(struct usbhs_priv *priv) 1119{ 1120 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 1121 struct usbhs_fifo *cfifo = usbhsf_get_cfifo(priv); 1122 struct usbhs_fifo *d0fifo = usbhsf_get_d0fifo(priv); 1123 struct usbhs_fifo *d1fifo = usbhsf_get_d1fifo(priv); 1124 1125 mod->irq_empty = usbhsf_irq_empty; 1126 mod->irq_ready = usbhsf_irq_ready; 1127 mod->irq_bempsts = 0; 1128 mod->irq_brdysts = 0; 1129 1130 cfifo->pipe = NULL; 1131 cfifo->tx_chan = NULL; 1132 cfifo->rx_chan = NULL; 1133 1134 d0fifo->pipe = NULL; 1135 d0fifo->tx_chan = NULL; 1136 d0fifo->rx_chan = NULL; 1137 1138 d1fifo->pipe = NULL; 1139 d1fifo->tx_chan = NULL; 1140 d1fifo->rx_chan = NULL; 1141 1142 usbhsf_dma_init(priv, usbhsf_get_d0fifo(priv)); 1143 usbhsf_dma_init(priv, usbhsf_get_d1fifo(priv)); 1144} 1145 1146void usbhs_fifo_quit(struct usbhs_priv *priv) 1147{ 1148 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 1149 1150 mod->irq_empty = NULL; 1151 mod->irq_ready = NULL; 1152 mod->irq_bempsts = 0; 1153 mod->irq_brdysts = 0; 1154 1155 usbhsf_dma_quit(priv, usbhsf_get_d0fifo(priv)); 1156 usbhsf_dma_quit(priv, usbhsf_get_d1fifo(priv)); 1157} 1158 1159int usbhs_fifo_probe(struct usbhs_priv *priv) 1160{ 1161 struct usbhs_fifo *fifo; 1162 1163 /* CFIFO */ 1164 fifo = usbhsf_get_cfifo(priv); 1165 fifo->name = "CFIFO"; 1166 fifo->port = CFIFO; 1167 fifo->sel = CFIFOSEL; 1168 fifo->ctr = CFIFOCTR; 1169 1170 /* D0FIFO */ 1171 fifo = usbhsf_get_d0fifo(priv); 1172 fifo->name = "D0FIFO"; 1173 fifo->port = D0FIFO; 1174 fifo->sel = D0FIFOSEL; 1175 fifo->ctr = D0FIFOCTR; 1176 fifo->tx_slave.slave_id = usbhs_get_dparam(priv, d0_tx_id); 1177 fifo->rx_slave.slave_id = usbhs_get_dparam(priv, d0_rx_id); 1178 1179 /* D1FIFO */ 1180 fifo = usbhsf_get_d1fifo(priv); 1181 fifo->name = "D1FIFO"; 1182 fifo->port = D1FIFO; 1183 fifo->sel = D1FIFOSEL; 1184 fifo->ctr = D1FIFOCTR; 1185 fifo->tx_slave.slave_id = usbhs_get_dparam(priv, d1_tx_id); 1186 fifo->rx_slave.slave_id = usbhs_get_dparam(priv, d1_rx_id); 1187 1188 return 0; 1189} 1190 1191void usbhs_fifo_remove(struct usbhs_priv *priv) 1192{ 1193} 1194