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/io.h> 18 #include <linux/list.h> 19 #include <linux/module.h> 20 #include <linux/platform_device.h> 21 #include <linux/slab.h> 22 #include <linux/usb.h> 23 #include <linux/usb/hcd.h> 24 #include "common.h" 25 26 /* 27 *** HARDWARE LIMITATION *** 28 * 29 * 1) renesas_usbhs has a limited number of controllable devices. 30 * it can control only 9 devices in generally. 31 * see DEVADDn / DCPMAXP / PIPEMAXP. 32 * 33 * 2) renesas_usbhs pipe number is limited. 34 * the pipe will be re-used for each devices. 35 * so, software should control DATA0/1 sequence of each devices. 36 */ 37 38 39 /* 40 * image of mod_host 41 * 42 * +--------+ 43 * | udev 0 | --> it is used when set address 44 * +--------+ 45 * 46 * +--------+ pipes are reused for each uep. 47 * | udev 1 |-+- [uep 0 (dcp) ] --+ pipe will be switched when 48 * +--------+ | | target device was changed 49 * +- [uep 1 (bulk)] --|---+ +--------------+ 50 * | +--------------> | pipe0 (dcp) | 51 * +- [uep 2 (bulk)] --|---|---+ +--------------+ 52 * | | | | pipe1 (isoc) | 53 * +--------+ | | | +--------------+ 54 * | udev 2 |-+- [uep 0 (dcp) ] --+ +-- |------> | pipe2 (bulk) | 55 * +--------+ | | | | +--------------+ 56 * +- [uep 1 (int) ] --|-+ | +------> | pipe3 (bulk) | 57 * | | | | +--------------+ 58 * +--------+ | +-|---|------> | pipe4 (int) | 59 * | udev 3 |-+- [uep 0 (dcp) ] --+ | | +--------------+ 60 * +--------+ | | | | .... | 61 * +- [uep 1 (bulk)] ------+ | | .... | 62 * | | 63 * +- [uep 2 (bulk)]-----------+ 64 */ 65 66 67 /* 68 * struct 69 */ 70 struct usbhsh_pipe_info { 71 unsigned int usr_cnt; /* see usbhsh_endpoint_alloc() */ 72 }; 73 74 struct usbhsh_request { 75 struct urb *urb; 76 struct usbhs_pkt pkt; 77 struct list_head ureq_link; /* see hpriv :: ureq_link_xxx */ 78 }; 79 80 struct usbhsh_device { 81 struct usb_device *usbv; 82 struct list_head ep_list_head; /* list of usbhsh_ep */ 83 }; 84 85 struct usbhsh_ep { 86 struct usbhs_pipe *pipe; 87 struct usbhsh_device *udev; /* attached udev */ 88 struct list_head ep_list; /* list to usbhsh_device */ 89 90 int maxp; 91 }; 92 93 #define USBHSH_DEVICE_MAX 10 /* see DEVADDn / DCPMAXP / PIPEMAXP */ 94 #define USBHSH_PORT_MAX 7 /* see DEVADDn :: HUBPORT */ 95 struct usbhsh_hpriv { 96 struct usbhs_mod mod; 97 struct usbhs_pipe *dcp; 98 99 struct usbhsh_device udev[USBHSH_DEVICE_MAX]; 100 101 struct usbhsh_pipe_info *pipe_info; 102 int pipe_size; 103 104 u32 port_stat; /* USB_PORT_STAT_xxx */ 105 106 struct completion *done; 107 108 /* see usbhsh_req_alloc/free */ 109 struct list_head ureq_link_active; 110 struct list_head ureq_link_free; 111 }; 112 113 114 static const char usbhsh_hcd_name[] = "renesas_usbhs host"; 115 116 /* 117 * macro 118 */ 119 #define usbhsh_priv_to_hpriv(priv) \ 120 container_of(usbhs_mod_get(priv, USBHS_HOST), struct usbhsh_hpriv, mod) 121 122 #define __usbhsh_for_each_hpipe(start, pos, h, i) \ 123 for (i = start, pos = (h)->hpipe + i; \ 124 i < (h)->hpipe_size; \ 125 i++, pos = (h)->hpipe + i) 126 127 #define usbhsh_for_each_hpipe(pos, hpriv, i) \ 128 __usbhsh_for_each_hpipe(1, pos, hpriv, i) 129 130 #define usbhsh_for_each_hpipe_with_dcp(pos, hpriv, i) \ 131 __usbhsh_for_each_hpipe(0, pos, hpriv, i) 132 133 #define __usbhsh_for_each_udev(start, pos, h, i) \ 134 for (i = start, pos = (h)->udev + i; \ 135 i < USBHSH_DEVICE_MAX; \ 136 i++, pos = (h)->udev + i) 137 138 #define usbhsh_for_each_udev(pos, hpriv, i) \ 139 __usbhsh_for_each_udev(1, pos, hpriv, i) 140 141 #define usbhsh_for_each_udev_with_dev0(pos, hpriv, i) \ 142 __usbhsh_for_each_udev(0, pos, hpriv, i) 143 144 #define usbhsh_hcd_to_hpriv(h) (struct usbhsh_hpriv *)((h)->hcd_priv) 145 #define usbhsh_hcd_to_dev(h) ((h)->self.controller) 146 147 #define usbhsh_hpriv_to_priv(h) ((h)->mod.priv) 148 #define usbhsh_hpriv_to_dcp(h) ((h)->dcp) 149 #define usbhsh_hpriv_to_hcd(h) \ 150 container_of((void *)h, struct usb_hcd, hcd_priv) 151 152 #define usbhsh_ep_to_uep(u) ((u)->hcpriv) 153 #define usbhsh_uep_to_pipe(u) ((u)->pipe) 154 #define usbhsh_uep_to_udev(u) ((u)->udev) 155 #define usbhsh_urb_to_ureq(u) ((u)->hcpriv) 156 #define usbhsh_urb_to_usbv(u) ((u)->dev) 157 158 #define usbhsh_usbv_to_udev(d) dev_get_drvdata(&(d)->dev) 159 160 #define usbhsh_udev_to_usbv(h) ((h)->usbv) 161 162 #define usbhsh_pipe_info(p) ((p)->mod_private) 163 164 #define usbhsh_device_number(h, d) ((int)((d) - (h)->udev)) 165 #define usbhsh_device_nth(h, d) ((h)->udev + d) 166 #define usbhsh_device0(h) usbhsh_device_nth(h, 0) 167 168 #define usbhsh_port_stat_init(h) ((h)->port_stat = 0) 169 #define usbhsh_port_stat_set(h, s) ((h)->port_stat |= (s)) 170 #define usbhsh_port_stat_clear(h, s) ((h)->port_stat &= ~(s)) 171 #define usbhsh_port_stat_get(h) ((h)->port_stat) 172 173 #define usbhsh_pkt_to_req(p) \ 174 container_of((void *)p, struct usbhsh_request, pkt) 175 176 /* 177 * req alloc/free 178 */ 179 static void usbhsh_req_list_init(struct usbhsh_hpriv *hpriv) 180 { 181 INIT_LIST_HEAD(&hpriv->ureq_link_active); 182 INIT_LIST_HEAD(&hpriv->ureq_link_free); 183 } 184 185 static void usbhsh_req_list_quit(struct usbhsh_hpriv *hpriv) 186 { 187 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); 188 struct device *dev = usbhsh_hcd_to_dev(hcd); 189 struct usbhsh_request *ureq, *next; 190 191 /* kfree all active ureq */ 192 list_for_each_entry_safe(ureq, next, 193 &hpriv->ureq_link_active, 194 ureq_link) { 195 dev_err(dev, "active ureq (%p) is force freed\n", ureq); 196 kfree(ureq); 197 } 198 199 /* kfree all free ureq */ 200 list_for_each_entry_safe(ureq, next, &hpriv->ureq_link_free, ureq_link) 201 kfree(ureq); 202 } 203 204 static struct usbhsh_request *usbhsh_req_alloc(struct usbhsh_hpriv *hpriv, 205 struct urb *urb, 206 gfp_t mem_flags) 207 { 208 struct usbhsh_request *ureq; 209 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 210 struct device *dev = usbhs_priv_to_dev(priv); 211 212 if (list_empty(&hpriv->ureq_link_free)) { 213 /* 214 * create new one if there is no free ureq 215 */ 216 ureq = kzalloc(sizeof(struct usbhsh_request), mem_flags); 217 if (ureq) 218 INIT_LIST_HEAD(&ureq->ureq_link); 219 } else { 220 /* 221 * reuse "free" ureq if exist 222 */ 223 ureq = list_entry(hpriv->ureq_link_free.next, 224 struct usbhsh_request, 225 ureq_link); 226 if (ureq) 227 list_del_init(&ureq->ureq_link); 228 } 229 230 if (!ureq) { 231 dev_err(dev, "ureq alloc fail\n"); 232 return NULL; 233 } 234 235 usbhs_pkt_init(&ureq->pkt); 236 237 /* 238 * push it to "active" list 239 */ 240 list_add_tail(&ureq->ureq_link, &hpriv->ureq_link_active); 241 ureq->urb = urb; 242 243 return ureq; 244 } 245 246 static void usbhsh_req_free(struct usbhsh_hpriv *hpriv, 247 struct usbhsh_request *ureq) 248 { 249 struct usbhs_pkt *pkt = &ureq->pkt; 250 251 usbhs_pkt_init(pkt); 252 253 /* 254 * removed from "active" list, 255 * and push it to "free" list 256 */ 257 ureq->urb = NULL; 258 list_del_init(&ureq->ureq_link); 259 list_add_tail(&ureq->ureq_link, &hpriv->ureq_link_free); 260 } 261 262 /* 263 * device control 264 */ 265 266 static int usbhsh_device_has_endpoint(struct usbhsh_device *udev) 267 { 268 return !list_empty(&udev->ep_list_head); 269 } 270 271 static struct usbhsh_device *usbhsh_device_alloc(struct usbhsh_hpriv *hpriv, 272 struct urb *urb) 273 { 274 struct usbhsh_device *udev = NULL; 275 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); 276 struct device *dev = usbhsh_hcd_to_dev(hcd); 277 struct usb_device *usbv = usbhsh_urb_to_usbv(urb); 278 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 279 int i; 280 281 /* 282 * device 0 283 */ 284 if (0 == usb_pipedevice(urb->pipe)) { 285 udev = usbhsh_device0(hpriv); 286 goto usbhsh_device_find; 287 } 288 289 /* 290 * find unused device 291 */ 292 usbhsh_for_each_udev(udev, hpriv, i) { 293 if (usbhsh_udev_to_usbv(udev)) 294 continue; 295 goto usbhsh_device_find; 296 } 297 298 dev_err(dev, "no free usbhsh_device\n"); 299 300 return NULL; 301 302 usbhsh_device_find: 303 if (usbhsh_device_has_endpoint(udev)) 304 dev_warn(dev, "udev have old endpoint\n"); 305 306 /* uep will be attached */ 307 INIT_LIST_HEAD(&udev->ep_list_head); 308 309 /* 310 * usbhsh_usbv_to_udev() 311 * usbhsh_udev_to_usbv() 312 * will be enable 313 */ 314 dev_set_drvdata(&usbv->dev, udev); 315 udev->usbv = usbv; 316 317 /* set device config */ 318 usbhs_set_device_speed(priv, 319 usbhsh_device_number(hpriv, udev), 320 usbhsh_device_number(hpriv, udev), 321 0, /* FIXME no parent */ 322 usbv->speed); 323 324 dev_dbg(dev, "%s [%d](%p)\n", __func__, 325 usbhsh_device_number(hpriv, udev), udev); 326 327 return udev; 328 } 329 330 static void usbhsh_device_free(struct usbhsh_hpriv *hpriv, 331 struct usbhsh_device *udev) 332 { 333 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); 334 struct device *dev = usbhsh_hcd_to_dev(hcd); 335 struct usb_device *usbv = usbhsh_udev_to_usbv(udev); 336 337 dev_dbg(dev, "%s [%d](%p)\n", __func__, 338 usbhsh_device_number(hpriv, udev), udev); 339 340 if (usbhsh_device_has_endpoint(udev)) 341 dev_warn(dev, "udev still have endpoint\n"); 342 343 /* 344 * usbhsh_usbv_to_udev() 345 * usbhsh_udev_to_usbv() 346 * will be disable 347 */ 348 dev_set_drvdata(&usbv->dev, NULL); 349 udev->usbv = NULL; 350 } 351 352 /* 353 * end-point control 354 */ 355 struct usbhsh_ep *usbhsh_endpoint_alloc(struct usbhsh_hpriv *hpriv, 356 struct usbhsh_device *udev, 357 struct usb_host_endpoint *ep, 358 gfp_t mem_flags) 359 { 360 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 361 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); 362 struct usbhsh_ep *uep; 363 struct usbhsh_pipe_info *info; 364 struct usbhs_pipe *pipe, *best_pipe; 365 struct device *dev = usbhsh_hcd_to_dev(hcd); 366 struct usb_endpoint_descriptor *desc = &ep->desc; 367 int type, i; 368 unsigned int min_usr; 369 370 uep = kzalloc(sizeof(struct usbhsh_ep), mem_flags); 371 if (!uep) { 372 dev_err(dev, "usbhsh_ep alloc fail\n"); 373 return NULL; 374 } 375 type = usb_endpoint_type(desc); 376 377 /* 378 * find best pipe for endpoint 379 * see 380 * HARDWARE LIMITATION 381 */ 382 min_usr = ~0; 383 best_pipe = NULL; 384 usbhs_for_each_pipe_with_dcp(pipe, priv, i) { 385 if (!usbhs_pipe_type_is(pipe, type)) 386 continue; 387 388 info = usbhsh_pipe_info(pipe); 389 390 if (min_usr > info->usr_cnt) { 391 min_usr = info->usr_cnt; 392 best_pipe = pipe; 393 } 394 } 395 396 if (unlikely(!best_pipe)) { 397 dev_err(dev, "couldn't find best pipe\n"); 398 kfree(uep); 399 return NULL; 400 } 401 402 /* 403 * init uep 404 */ 405 uep->pipe = best_pipe; 406 uep->maxp = usb_endpoint_maxp(desc); 407 usbhsh_uep_to_udev(uep) = udev; 408 usbhsh_ep_to_uep(ep) = uep; 409 410 /* 411 * update pipe user count 412 */ 413 info = usbhsh_pipe_info(best_pipe); 414 info->usr_cnt++; 415 416 /* init this endpoint, and attach it to udev */ 417 INIT_LIST_HEAD(&uep->ep_list); 418 list_add_tail(&uep->ep_list, &udev->ep_list_head); 419 420 /* 421 * usbhs_pipe_config_update() should be called after 422 * usbhs_device_config() 423 * see 424 * DCPMAXP/PIPEMAXP 425 */ 426 usbhs_pipe_config_update(uep->pipe, 427 usbhsh_device_number(hpriv, udev), 428 usb_endpoint_num(desc), 429 uep->maxp); 430 431 dev_dbg(dev, "%s [%d-%s](%p)\n", __func__, 432 usbhsh_device_number(hpriv, udev), 433 usbhs_pipe_name(pipe), uep); 434 435 return uep; 436 } 437 438 void usbhsh_endpoint_free(struct usbhsh_hpriv *hpriv, 439 struct usb_host_endpoint *ep) 440 { 441 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 442 struct device *dev = usbhs_priv_to_dev(priv); 443 struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep); 444 struct usbhsh_pipe_info *info; 445 446 if (!uep) 447 return; 448 449 dev_dbg(dev, "%s [%d-%s](%p)\n", __func__, 450 usbhsh_device_number(hpriv, usbhsh_uep_to_udev(uep)), 451 usbhs_pipe_name(uep->pipe), uep); 452 453 info = usbhsh_pipe_info(uep->pipe); 454 info->usr_cnt--; 455 456 /* remove this endpoint from udev */ 457 list_del_init(&uep->ep_list); 458 459 usbhsh_uep_to_udev(uep) = NULL; 460 usbhsh_ep_to_uep(ep) = NULL; 461 462 kfree(uep); 463 } 464 465 /* 466 * queue push/pop 467 */ 468 static void usbhsh_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt) 469 { 470 struct usbhsh_request *ureq = usbhsh_pkt_to_req(pkt); 471 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 472 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); 473 struct urb *urb = ureq->urb; 474 struct device *dev = usbhs_priv_to_dev(priv); 475 476 dev_dbg(dev, "%s\n", __func__); 477 478 if (!urb) { 479 dev_warn(dev, "pkt doesn't have urb\n"); 480 return; 481 } 482 483 urb->actual_length = pkt->actual; 484 usbhsh_req_free(hpriv, ureq); 485 usbhsh_urb_to_ureq(urb) = NULL; 486 487 usb_hcd_unlink_urb_from_ep(hcd, urb); 488 usb_hcd_giveback_urb(hcd, urb, 0); 489 } 490 491 static int usbhsh_queue_push(struct usb_hcd *hcd, 492 struct usbhs_pipe *pipe, 493 struct urb *urb) 494 { 495 struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb); 496 struct usbhs_pkt *pkt = &ureq->pkt; 497 struct device *dev = usbhsh_hcd_to_dev(hcd); 498 void *buf; 499 int len; 500 501 if (usb_pipeisoc(urb->pipe)) { 502 dev_err(dev, "pipe iso is not supported now\n"); 503 return -EIO; 504 } 505 506 if (usb_pipein(urb->pipe)) 507 pipe->handler = &usbhs_fifo_pio_pop_handler; 508 else 509 pipe->handler = &usbhs_fifo_pio_push_handler; 510 511 buf = (void *)(urb->transfer_buffer + urb->actual_length); 512 len = urb->transfer_buffer_length - urb->actual_length; 513 514 dev_dbg(dev, "%s\n", __func__); 515 usbhs_pkt_push(pipe, pkt, usbhsh_queue_done, 516 buf, len, (urb->transfer_flags & URB_ZERO_PACKET)); 517 usbhs_pkt_start(pipe); 518 519 return 0; 520 } 521 522 /* 523 * DCP setup stage 524 */ 525 static int usbhsh_is_request_address(struct urb *urb) 526 { 527 struct usb_ctrlrequest *cmd; 528 529 cmd = (struct usb_ctrlrequest *)urb->setup_packet; 530 531 if ((DeviceOutRequest == cmd->bRequestType << 8) && 532 (USB_REQ_SET_ADDRESS == cmd->bRequest)) 533 return 1; 534 else 535 return 0; 536 } 537 538 static void usbhsh_setup_stage_packet_push(struct usbhsh_hpriv *hpriv, 539 struct urb *urb, 540 struct usbhs_pipe *pipe) 541 { 542 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 543 struct usb_ctrlrequest req; 544 struct device *dev = usbhs_priv_to_dev(priv); 545 546 /* 547 * wait setup packet ACK 548 * see 549 * usbhsh_irq_setup_ack() 550 * usbhsh_irq_setup_err() 551 */ 552 DECLARE_COMPLETION(done); 553 hpriv->done = &done; 554 555 /* copy original request */ 556 memcpy(&req, urb->setup_packet, sizeof(struct usb_ctrlrequest)); 557 558 /* 559 * renesas_usbhs can not use original usb address. 560 * see HARDWARE LIMITATION. 561 * modify usb address here. 562 */ 563 if (usbhsh_is_request_address(urb)) { 564 /* FIXME */ 565 req.wValue = 1; 566 dev_dbg(dev, "create new address - %d\n", req.wValue); 567 } 568 569 /* set request */ 570 usbhs_usbreq_set_val(priv, &req); 571 572 /* 573 * wait setup packet ACK 574 */ 575 wait_for_completion(&done); 576 hpriv->done = NULL; 577 578 dev_dbg(dev, "%s done\n", __func__); 579 } 580 581 /* 582 * DCP data stage 583 */ 584 static void usbhsh_data_stage_packet_done(struct usbhs_priv *priv, 585 struct usbhs_pkt *pkt) 586 { 587 struct usbhsh_request *ureq = usbhsh_pkt_to_req(pkt); 588 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 589 struct urb *urb = ureq->urb; 590 591 /* this ureq was connected to urb when usbhsh_urb_enqueue() */ 592 593 usbhsh_req_free(hpriv, ureq); 594 usbhsh_urb_to_ureq(urb) = NULL; 595 } 596 597 static void usbhsh_data_stage_packet_push(struct usbhsh_hpriv *hpriv, 598 struct urb *urb, 599 struct usbhs_pipe *pipe) 600 { 601 struct usbhsh_request *ureq; 602 struct usbhs_pkt *pkt; 603 604 /* 605 * FIXME 606 * 607 * data stage uses ureq which is connected to urb 608 * see usbhsh_urb_enqueue() :: alloc new request. 609 * it will be freed in usbhsh_data_stage_packet_done() 610 */ 611 ureq = usbhsh_urb_to_ureq(urb); 612 pkt = &ureq->pkt; 613 614 if (usb_pipein(urb->pipe)) 615 pipe->handler = &usbhs_dcp_data_stage_in_handler; 616 else 617 pipe->handler = &usbhs_dcp_data_stage_out_handler; 618 619 usbhs_pkt_push(pipe, pkt, 620 usbhsh_data_stage_packet_done, 621 urb->transfer_buffer, 622 urb->transfer_buffer_length, 623 (urb->transfer_flags & URB_ZERO_PACKET)); 624 } 625 626 /* 627 * DCP status stage 628 */ 629 static void usbhsh_status_stage_packet_push(struct usbhsh_hpriv *hpriv, 630 struct urb *urb, 631 struct usbhs_pipe *pipe) 632 { 633 struct usbhsh_request *ureq; 634 struct usbhs_pkt *pkt; 635 636 /* 637 * FIXME 638 * 639 * status stage uses allocated ureq. 640 * it will be freed on usbhsh_queue_done() 641 */ 642 ureq = usbhsh_req_alloc(hpriv, urb, GFP_KERNEL); 643 pkt = &ureq->pkt; 644 645 if (usb_pipein(urb->pipe)) 646 pipe->handler = &usbhs_dcp_status_stage_in_handler; 647 else 648 pipe->handler = &usbhs_dcp_status_stage_out_handler; 649 650 usbhs_pkt_push(pipe, pkt, 651 usbhsh_queue_done, 652 NULL, 653 urb->transfer_buffer_length, 654 0); 655 } 656 657 static int usbhsh_dcp_queue_push(struct usb_hcd *hcd, 658 struct usbhsh_hpriv *hpriv, 659 struct usbhs_pipe *pipe, 660 struct urb *urb) 661 { 662 struct device *dev = usbhsh_hcd_to_dev(hcd); 663 664 dev_dbg(dev, "%s\n", __func__); 665 666 /* 667 * setup stage 668 * 669 * usbhsh_send_setup_stage_packet() wait SACK/SIGN 670 */ 671 usbhsh_setup_stage_packet_push(hpriv, urb, pipe); 672 673 /* 674 * data stage 675 * 676 * It is pushed only when urb has buffer. 677 */ 678 if (urb->transfer_buffer_length) 679 usbhsh_data_stage_packet_push(hpriv, urb, pipe); 680 681 /* 682 * status stage 683 */ 684 usbhsh_status_stage_packet_push(hpriv, urb, pipe); 685 686 /* 687 * start pushed packets 688 */ 689 usbhs_pkt_start(pipe); 690 691 return 0; 692 } 693 694 /* 695 * dma map functions 696 */ 697 static int usbhsh_dma_map_ctrl(struct usbhs_pkt *pkt, int map) 698 { 699 return 0; 700 } 701 702 /* 703 * for hc_driver 704 */ 705 static int usbhsh_host_start(struct usb_hcd *hcd) 706 { 707 return 0; 708 } 709 710 static void usbhsh_host_stop(struct usb_hcd *hcd) 711 { 712 } 713 714 static int usbhsh_urb_enqueue(struct usb_hcd *hcd, 715 struct urb *urb, 716 gfp_t mem_flags) 717 { 718 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd); 719 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 720 struct device *dev = usbhs_priv_to_dev(priv); 721 struct usb_device *usbv = usbhsh_urb_to_usbv(urb); 722 struct usb_host_endpoint *ep = urb->ep; 723 struct usbhsh_request *ureq; 724 struct usbhsh_device *udev, *new_udev = NULL; 725 struct usbhs_pipe *pipe; 726 struct usbhsh_ep *uep; 727 728 int ret; 729 730 dev_dbg(dev, "%s (%s)\n", 731 __func__, usb_pipein(urb->pipe) ? "in" : "out"); 732 733 ret = usb_hcd_link_urb_to_ep(hcd, urb); 734 if (ret) 735 goto usbhsh_urb_enqueue_error_not_linked; 736 737 /* 738 * get udev 739 */ 740 udev = usbhsh_usbv_to_udev(usbv); 741 if (!udev) { 742 new_udev = usbhsh_device_alloc(hpriv, urb); 743 if (!new_udev) 744 goto usbhsh_urb_enqueue_error_not_linked; 745 746 udev = new_udev; 747 } 748 749 /* 750 * get uep 751 */ 752 uep = usbhsh_ep_to_uep(ep); 753 if (!uep) { 754 uep = usbhsh_endpoint_alloc(hpriv, udev, ep, mem_flags); 755 if (!uep) 756 goto usbhsh_urb_enqueue_error_free_device; 757 } 758 pipe = usbhsh_uep_to_pipe(uep); 759 760 /* 761 * alloc new request 762 */ 763 ureq = usbhsh_req_alloc(hpriv, urb, mem_flags); 764 if (unlikely(!ureq)) { 765 ret = -ENOMEM; 766 goto usbhsh_urb_enqueue_error_free_endpoint; 767 } 768 usbhsh_urb_to_ureq(urb) = ureq; 769 770 /* 771 * push packet 772 */ 773 if (usb_pipecontrol(urb->pipe)) 774 usbhsh_dcp_queue_push(hcd, hpriv, pipe, urb); 775 else 776 usbhsh_queue_push(hcd, pipe, urb); 777 778 return 0; 779 780 usbhsh_urb_enqueue_error_free_endpoint: 781 usbhsh_endpoint_free(hpriv, ep); 782 usbhsh_urb_enqueue_error_free_device: 783 if (new_udev) 784 usbhsh_device_free(hpriv, new_udev); 785 usbhsh_urb_enqueue_error_not_linked: 786 787 dev_dbg(dev, "%s error\n", __func__); 788 789 return ret; 790 } 791 792 static int usbhsh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) 793 { 794 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd); 795 struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb); 796 797 if (ureq) { 798 usbhsh_req_free(hpriv, ureq); 799 usbhsh_urb_to_ureq(urb) = NULL; 800 } 801 802 return 0; 803 } 804 805 static void usbhsh_endpoint_disable(struct usb_hcd *hcd, 806 struct usb_host_endpoint *ep) 807 { 808 struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep); 809 struct usbhsh_device *udev; 810 struct usbhsh_hpriv *hpriv; 811 812 /* 813 * this function might be called manytimes by same hcd/ep 814 * in-endpoitn == out-endpoint if ep == dcp. 815 */ 816 if (!uep) 817 return; 818 819 udev = usbhsh_uep_to_udev(uep); 820 hpriv = usbhsh_hcd_to_hpriv(hcd); 821 822 usbhsh_endpoint_free(hpriv, ep); 823 ep->hcpriv = NULL; 824 825 /* 826 * if there is no endpoint, 827 * free device 828 */ 829 if (!usbhsh_device_has_endpoint(udev)) 830 usbhsh_device_free(hpriv, udev); 831 } 832 833 static int usbhsh_hub_status_data(struct usb_hcd *hcd, char *buf) 834 { 835 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd); 836 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 837 struct device *dev = usbhs_priv_to_dev(priv); 838 int roothub_id = 1; /* only 1 root hub */ 839 840 /* 841 * does port stat was changed ? 842 * check USB_PORT_STAT_C_xxx << 16 843 */ 844 if (usbhsh_port_stat_get(hpriv) & 0xFFFF0000) 845 *buf = (1 << roothub_id); 846 else 847 *buf = 0; 848 849 dev_dbg(dev, "%s (%02x)\n", __func__, *buf); 850 851 return !!(*buf); 852 } 853 854 static int __usbhsh_hub_hub_feature(struct usbhsh_hpriv *hpriv, 855 u16 typeReq, u16 wValue, 856 u16 wIndex, char *buf, u16 wLength) 857 { 858 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 859 struct device *dev = usbhs_priv_to_dev(priv); 860 861 switch (wValue) { 862 case C_HUB_OVER_CURRENT: 863 case C_HUB_LOCAL_POWER: 864 dev_dbg(dev, "%s :: C_HUB_xx\n", __func__); 865 return 0; 866 } 867 868 return -EPIPE; 869 } 870 871 static int __usbhsh_hub_port_feature(struct usbhsh_hpriv *hpriv, 872 u16 typeReq, u16 wValue, 873 u16 wIndex, char *buf, u16 wLength) 874 { 875 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 876 struct device *dev = usbhs_priv_to_dev(priv); 877 int enable = (typeReq == SetPortFeature); 878 int speed, i, timeout = 128; 879 int roothub_id = 1; /* only 1 root hub */ 880 881 /* common error */ 882 if (wIndex > roothub_id || wLength != 0) 883 return -EPIPE; 884 885 /* check wValue */ 886 switch (wValue) { 887 case USB_PORT_FEAT_POWER: 888 usbhs_vbus_ctrl(priv, enable); 889 dev_dbg(dev, "%s :: USB_PORT_FEAT_POWER\n", __func__); 890 break; 891 892 case USB_PORT_FEAT_ENABLE: 893 case USB_PORT_FEAT_SUSPEND: 894 case USB_PORT_FEAT_C_ENABLE: 895 case USB_PORT_FEAT_C_SUSPEND: 896 case USB_PORT_FEAT_C_CONNECTION: 897 case USB_PORT_FEAT_C_OVER_CURRENT: 898 case USB_PORT_FEAT_C_RESET: 899 dev_dbg(dev, "%s :: USB_PORT_FEAT_xxx\n", __func__); 900 break; 901 902 case USB_PORT_FEAT_RESET: 903 if (!enable) 904 break; 905 906 usbhsh_port_stat_clear(hpriv, 907 USB_PORT_STAT_HIGH_SPEED | 908 USB_PORT_STAT_LOW_SPEED); 909 910 usbhs_bus_send_reset(priv); 911 msleep(20); 912 usbhs_bus_send_sof_enable(priv); 913 914 for (i = 0; i < timeout ; i++) { 915 switch (usbhs_bus_get_speed(priv)) { 916 case USB_SPEED_LOW: 917 speed = USB_PORT_STAT_LOW_SPEED; 918 goto got_usb_bus_speed; 919 case USB_SPEED_HIGH: 920 speed = USB_PORT_STAT_HIGH_SPEED; 921 goto got_usb_bus_speed; 922 case USB_SPEED_FULL: 923 speed = 0; 924 goto got_usb_bus_speed; 925 } 926 927 msleep(20); 928 } 929 return -EPIPE; 930 931 got_usb_bus_speed: 932 usbhsh_port_stat_set(hpriv, speed); 933 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_ENABLE); 934 935 dev_dbg(dev, "%s :: USB_PORT_FEAT_RESET (speed = %d)\n", 936 __func__, speed); 937 938 /* status change is not needed */ 939 return 0; 940 941 default: 942 return -EPIPE; 943 } 944 945 /* set/clear status */ 946 if (enable) 947 usbhsh_port_stat_set(hpriv, (1 << wValue)); 948 else 949 usbhsh_port_stat_clear(hpriv, (1 << wValue)); 950 951 return 0; 952 } 953 954 static int __usbhsh_hub_get_status(struct usbhsh_hpriv *hpriv, 955 u16 typeReq, u16 wValue, 956 u16 wIndex, char *buf, u16 wLength) 957 { 958 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 959 struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf; 960 struct device *dev = usbhs_priv_to_dev(priv); 961 int roothub_id = 1; /* only 1 root hub */ 962 963 switch (typeReq) { 964 case GetHubStatus: 965 dev_dbg(dev, "%s :: GetHubStatus\n", __func__); 966 967 *buf = 0x00; 968 break; 969 970 case GetPortStatus: 971 if (wIndex != roothub_id) 972 return -EPIPE; 973 974 dev_dbg(dev, "%s :: GetPortStatus\n", __func__); 975 *(__le32 *)buf = cpu_to_le32(usbhsh_port_stat_get(hpriv)); 976 break; 977 978 case GetHubDescriptor: 979 desc->bDescriptorType = 0x29; 980 desc->bHubContrCurrent = 0; 981 desc->bNbrPorts = roothub_id; 982 desc->bDescLength = 9; 983 desc->bPwrOn2PwrGood = 0; 984 desc->wHubCharacteristics = cpu_to_le16(0x0011); 985 desc->u.hs.DeviceRemovable[0] = (roothub_id << 1); 986 desc->u.hs.DeviceRemovable[1] = ~0; 987 dev_dbg(dev, "%s :: GetHubDescriptor\n", __func__); 988 break; 989 } 990 991 return 0; 992 } 993 994 static int usbhsh_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, 995 u16 wIndex, char *buf, u16 wLength) 996 { 997 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd); 998 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 999 struct device *dev = usbhs_priv_to_dev(priv); 1000 int ret = -EPIPE; 1001 1002 switch (typeReq) { 1003 1004 /* Hub Feature */ 1005 case ClearHubFeature: 1006 case SetHubFeature: 1007 ret = __usbhsh_hub_hub_feature(hpriv, typeReq, 1008 wValue, wIndex, buf, wLength); 1009 break; 1010 1011 /* Port Feature */ 1012 case SetPortFeature: 1013 case ClearPortFeature: 1014 ret = __usbhsh_hub_port_feature(hpriv, typeReq, 1015 wValue, wIndex, buf, wLength); 1016 break; 1017 1018 /* Get status */ 1019 case GetHubStatus: 1020 case GetPortStatus: 1021 case GetHubDescriptor: 1022 ret = __usbhsh_hub_get_status(hpriv, typeReq, 1023 wValue, wIndex, buf, wLength); 1024 break; 1025 } 1026 1027 dev_dbg(dev, "typeReq = %x, ret = %d, port_stat = %x\n", 1028 typeReq, ret, usbhsh_port_stat_get(hpriv)); 1029 1030 return ret; 1031 } 1032 1033 static struct hc_driver usbhsh_driver = { 1034 .description = usbhsh_hcd_name, 1035 .hcd_priv_size = sizeof(struct usbhsh_hpriv), 1036 1037 /* 1038 * generic hardware linkage 1039 */ 1040 .flags = HCD_USB2, 1041 1042 .start = usbhsh_host_start, 1043 .stop = usbhsh_host_stop, 1044 1045 /* 1046 * managing i/o requests and associated device resources 1047 */ 1048 .urb_enqueue = usbhsh_urb_enqueue, 1049 .urb_dequeue = usbhsh_urb_dequeue, 1050 .endpoint_disable = usbhsh_endpoint_disable, 1051 1052 /* 1053 * root hub 1054 */ 1055 .hub_status_data = usbhsh_hub_status_data, 1056 .hub_control = usbhsh_hub_control, 1057 }; 1058 1059 /* 1060 * interrupt functions 1061 */ 1062 static int usbhsh_irq_attch(struct usbhs_priv *priv, 1063 struct usbhs_irq_state *irq_state) 1064 { 1065 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 1066 struct device *dev = usbhs_priv_to_dev(priv); 1067 1068 dev_dbg(dev, "device attached\n"); 1069 1070 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_CONNECTION); 1071 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16); 1072 1073 return 0; 1074 } 1075 1076 static int usbhsh_irq_dtch(struct usbhs_priv *priv, 1077 struct usbhs_irq_state *irq_state) 1078 { 1079 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 1080 struct device *dev = usbhs_priv_to_dev(priv); 1081 1082 dev_dbg(dev, "device detached\n"); 1083 1084 usbhsh_port_stat_clear(hpriv, USB_PORT_STAT_CONNECTION); 1085 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16); 1086 1087 return 0; 1088 } 1089 1090 static int usbhsh_irq_setup_ack(struct usbhs_priv *priv, 1091 struct usbhs_irq_state *irq_state) 1092 { 1093 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 1094 struct device *dev = usbhs_priv_to_dev(priv); 1095 1096 dev_dbg(dev, "setup packet OK\n"); 1097 1098 if (unlikely(!hpriv->done)) 1099 dev_err(dev, "setup ack happen without necessary data\n"); 1100 else 1101 complete(hpriv->done); /* see usbhsh_urb_enqueue() */ 1102 1103 return 0; 1104 } 1105 1106 static int usbhsh_irq_setup_err(struct usbhs_priv *priv, 1107 struct usbhs_irq_state *irq_state) 1108 { 1109 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 1110 struct device *dev = usbhs_priv_to_dev(priv); 1111 1112 dev_dbg(dev, "setup packet Err\n"); 1113 1114 if (unlikely(!hpriv->done)) 1115 dev_err(dev, "setup err happen without necessary data\n"); 1116 else 1117 complete(hpriv->done); /* see usbhsh_urb_enqueue() */ 1118 1119 return 0; 1120 } 1121 1122 /* 1123 * module start/stop 1124 */ 1125 static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv) 1126 { 1127 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 1128 struct usbhsh_pipe_info *pipe_info = hpriv->pipe_info; 1129 struct usbhs_pipe *pipe; 1130 u32 *pipe_type = usbhs_get_dparam(priv, pipe_type); 1131 int pipe_size = usbhs_get_dparam(priv, pipe_size); 1132 int old_type, dir_in, i; 1133 1134 /* init all pipe */ 1135 old_type = USB_ENDPOINT_XFER_CONTROL; 1136 for (i = 0; i < pipe_size; i++) { 1137 pipe_info[i].usr_cnt = 0; 1138 1139 /* 1140 * data "output" will be finished as soon as possible, 1141 * but there is no guaranty at data "input" case. 1142 * 1143 * "input" needs "standby" pipe. 1144 * So, "input" direction pipe > "output" direction pipe 1145 * is good idea. 1146 * 1147 * 1st USB_ENDPOINT_XFER_xxx will be output direction, 1148 * and the other will be input direction here. 1149 * 1150 * ex) 1151 * ... 1152 * USB_ENDPOINT_XFER_ISOC -> dir out 1153 * USB_ENDPOINT_XFER_ISOC -> dir in 1154 * USB_ENDPOINT_XFER_BULK -> dir out 1155 * USB_ENDPOINT_XFER_BULK -> dir in 1156 * USB_ENDPOINT_XFER_BULK -> dir in 1157 * ... 1158 */ 1159 dir_in = (pipe_type[i] == old_type); 1160 old_type = pipe_type[i]; 1161 1162 if (USB_ENDPOINT_XFER_CONTROL == pipe_type[i]) { 1163 pipe = usbhs_dcp_malloc(priv); 1164 usbhsh_hpriv_to_dcp(hpriv) = pipe; 1165 } else { 1166 pipe = usbhs_pipe_malloc(priv, 1167 pipe_type[i], 1168 dir_in); 1169 } 1170 1171 pipe->mod_private = pipe_info + i; 1172 } 1173 } 1174 1175 static int usbhsh_start(struct usbhs_priv *priv) 1176 { 1177 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 1178 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); 1179 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 1180 struct device *dev = usbhs_priv_to_dev(priv); 1181 int ret; 1182 1183 /* add hcd */ 1184 ret = usb_add_hcd(hcd, 0, 0); 1185 if (ret < 0) 1186 return 0; 1187 1188 /* 1189 * pipe initialize and enable DCP 1190 */ 1191 usbhs_pipe_init(priv, 1192 usbhsh_dma_map_ctrl); 1193 usbhs_fifo_init(priv); 1194 usbhsh_pipe_init_for_host(priv); 1195 1196 /* 1197 * system config enble 1198 * - HI speed 1199 * - host 1200 * - usb module 1201 */ 1202 usbhs_sys_hispeed_ctrl(priv, 1); 1203 usbhs_sys_host_ctrl(priv, 1); 1204 usbhs_sys_usb_ctrl(priv, 1); 1205 1206 /* 1207 * enable irq callback 1208 */ 1209 mod->irq_attch = usbhsh_irq_attch; 1210 mod->irq_dtch = usbhsh_irq_dtch; 1211 mod->irq_sack = usbhsh_irq_setup_ack; 1212 mod->irq_sign = usbhsh_irq_setup_err; 1213 usbhs_irq_callback_update(priv, mod); 1214 1215 dev_dbg(dev, "start host\n"); 1216 1217 return ret; 1218 } 1219 1220 static int usbhsh_stop(struct usbhs_priv *priv) 1221 { 1222 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 1223 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); 1224 struct device *dev = usbhs_priv_to_dev(priv); 1225 1226 usb_remove_hcd(hcd); 1227 1228 /* disable sys */ 1229 usbhs_sys_hispeed_ctrl(priv, 0); 1230 usbhs_sys_host_ctrl(priv, 0); 1231 usbhs_sys_usb_ctrl(priv, 0); 1232 1233 dev_dbg(dev, "quit host\n"); 1234 1235 return 0; 1236 } 1237 1238 int __devinit usbhs_mod_host_probe(struct usbhs_priv *priv) 1239 { 1240 struct usbhsh_hpriv *hpriv; 1241 struct usb_hcd *hcd; 1242 struct usbhsh_pipe_info *pipe_info; 1243 struct usbhsh_device *udev; 1244 struct device *dev = usbhs_priv_to_dev(priv); 1245 int pipe_size = usbhs_get_dparam(priv, pipe_size); 1246 int i; 1247 1248 /* initialize hcd */ 1249 hcd = usb_create_hcd(&usbhsh_driver, dev, usbhsh_hcd_name); 1250 if (!hcd) { 1251 dev_err(dev, "Failed to create hcd\n"); 1252 return -ENOMEM; 1253 } 1254 1255 pipe_info = kzalloc(sizeof(*pipe_info) * pipe_size, GFP_KERNEL); 1256 if (!pipe_info) { 1257 dev_err(dev, "Could not allocate pipe_info\n"); 1258 goto usbhs_mod_host_probe_err; 1259 } 1260 1261 /* 1262 * CAUTION 1263 * 1264 * There is no guarantee that it is possible to access usb module here. 1265 * Don't accesses to it. 1266 * The accesse will be enable after "usbhsh_start" 1267 */ 1268 1269 hpriv = usbhsh_hcd_to_hpriv(hcd); 1270 1271 /* 1272 * register itself 1273 */ 1274 usbhs_mod_register(priv, &hpriv->mod, USBHS_HOST); 1275 1276 /* init hpriv */ 1277 hpriv->mod.name = "host"; 1278 hpriv->mod.start = usbhsh_start; 1279 hpriv->mod.stop = usbhsh_stop; 1280 hpriv->pipe_info = pipe_info; 1281 hpriv->pipe_size = pipe_size; 1282 hpriv->done = NULL; 1283 usbhsh_req_list_init(hpriv); 1284 usbhsh_port_stat_init(hpriv); 1285 1286 /* init all device */ 1287 usbhsh_for_each_udev_with_dev0(udev, hpriv, i) { 1288 udev->usbv = NULL; 1289 INIT_LIST_HEAD(&udev->ep_list_head); 1290 } 1291 1292 dev_info(dev, "host probed\n"); 1293 1294 return 0; 1295 1296 usbhs_mod_host_probe_err: 1297 usb_put_hcd(hcd); 1298 1299 return -ENOMEM; 1300 } 1301 1302 int __devexit usbhs_mod_host_remove(struct usbhs_priv *priv) 1303 { 1304 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 1305 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); 1306 1307 usbhsh_req_list_quit(hpriv); 1308 1309 usb_put_hcd(hcd); 1310 1311 return 0; 1312 } 1313