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 * +--------+ | | other device requested 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 * @ : uep requested free pipe, but all have been used. 66 * now it is waiting for free pipe 67 */ 68 69 70 /* 71 * struct 72 */ 73 struct usbhsh_request { 74 struct urb *urb; 75 struct usbhs_pkt pkt; 76 }; 77 78 struct usbhsh_device { 79 struct usb_device *usbv; 80 struct list_head ep_list_head; /* list of usbhsh_ep */ 81 }; 82 83 struct usbhsh_ep { 84 struct usbhs_pipe *pipe; /* attached pipe */ 85 struct usbhsh_device *udev; /* attached udev */ 86 struct usb_host_endpoint *ep; 87 struct list_head ep_list; /* list to usbhsh_device */ 88 unsigned int counter; /* pipe attach counter */ 89 }; 90 91 #define USBHSH_DEVICE_MAX 10 /* see DEVADDn / DCPMAXP / PIPEMAXP */ 92 #define USBHSH_PORT_MAX 7 /* see DEVADDn :: HUBPORT */ 93 struct usbhsh_hpriv { 94 struct usbhs_mod mod; 95 struct usbhs_pipe *dcp; 96 97 struct usbhsh_device udev[USBHSH_DEVICE_MAX]; 98 99 u32 port_stat; /* USB_PORT_STAT_xxx */ 100 101 struct completion setup_ack_done; 102 }; 103 104 105 static const char usbhsh_hcd_name[] = "renesas_usbhs host"; 106 107 /* 108 * macro 109 */ 110 #define usbhsh_priv_to_hpriv(priv) \ 111 container_of(usbhs_mod_get(priv, USBHS_HOST), struct usbhsh_hpriv, mod) 112 113 #define __usbhsh_for_each_udev(start, pos, h, i) \ 114 for ((i) = start; \ 115 ((i) < USBHSH_DEVICE_MAX) && ((pos) = (h)->udev + (i)); \ 116 (i)++) 117 118 #define usbhsh_for_each_udev(pos, hpriv, i) \ 119 __usbhsh_for_each_udev(1, pos, hpriv, i) 120 121 #define usbhsh_for_each_udev_with_dev0(pos, hpriv, i) \ 122 __usbhsh_for_each_udev(0, pos, hpriv, i) 123 124 #define usbhsh_hcd_to_hpriv(h) (struct usbhsh_hpriv *)((h)->hcd_priv) 125 #define usbhsh_hcd_to_dev(h) ((h)->self.controller) 126 127 #define usbhsh_hpriv_to_priv(h) ((h)->mod.priv) 128 #define usbhsh_hpriv_to_dcp(h) ((h)->dcp) 129 #define usbhsh_hpriv_to_hcd(h) \ 130 container_of((void *)h, struct usb_hcd, hcd_priv) 131 132 #define usbhsh_ep_to_uep(u) ((u)->hcpriv) 133 #define usbhsh_uep_to_pipe(u) ((u)->pipe) 134 #define usbhsh_uep_to_udev(u) ((u)->udev) 135 #define usbhsh_uep_to_ep(u) ((u)->ep) 136 137 #define usbhsh_urb_to_ureq(u) ((u)->hcpriv) 138 #define usbhsh_urb_to_usbv(u) ((u)->dev) 139 140 #define usbhsh_usbv_to_udev(d) dev_get_drvdata(&(d)->dev) 141 142 #define usbhsh_udev_to_usbv(h) ((h)->usbv) 143 #define usbhsh_udev_is_used(h) usbhsh_udev_to_usbv(h) 144 145 #define usbhsh_pipe_to_uep(p) ((p)->mod_private) 146 147 #define usbhsh_device_parent(d) (usbhsh_usbv_to_udev((d)->usbv->parent)) 148 #define usbhsh_device_hubport(d) ((d)->usbv->portnum) 149 #define usbhsh_device_number(h, d) ((int)((d) - (h)->udev)) 150 #define usbhsh_device_nth(h, d) ((h)->udev + d) 151 #define usbhsh_device0(h) usbhsh_device_nth(h, 0) 152 153 #define usbhsh_port_stat_init(h) ((h)->port_stat = 0) 154 #define usbhsh_port_stat_set(h, s) ((h)->port_stat |= (s)) 155 #define usbhsh_port_stat_clear(h, s) ((h)->port_stat &= ~(s)) 156 #define usbhsh_port_stat_get(h) ((h)->port_stat) 157 158 #define usbhsh_pkt_to_ureq(p) \ 159 container_of((void *)p, struct usbhsh_request, pkt) 160 161 /* 162 * req alloc/free 163 */ 164 static struct usbhsh_request *usbhsh_ureq_alloc(struct usbhsh_hpriv *hpriv, 165 struct urb *urb, 166 gfp_t mem_flags) 167 { 168 struct usbhsh_request *ureq; 169 170 ureq = kzalloc(sizeof(struct usbhsh_request), mem_flags); 171 if (!ureq) 172 return NULL; 173 174 usbhs_pkt_init(&ureq->pkt); 175 ureq->urb = urb; 176 usbhsh_urb_to_ureq(urb) = ureq; 177 178 return ureq; 179 } 180 181 static void usbhsh_ureq_free(struct usbhsh_hpriv *hpriv, 182 struct usbhsh_request *ureq) 183 { 184 usbhsh_urb_to_ureq(ureq->urb) = NULL; 185 ureq->urb = NULL; 186 187 kfree(ureq); 188 } 189 190 /* 191 * status 192 */ 193 static int usbhsh_is_running(struct usbhsh_hpriv *hpriv) 194 { 195 /* 196 * we can decide some device is attached or not 197 * by checking mod.irq_attch 198 * see 199 * usbhsh_irq_attch() 200 * usbhsh_irq_dtch() 201 */ 202 return (hpriv->mod.irq_attch == NULL); 203 } 204 205 /* 206 * pipe control 207 */ 208 static void usbhsh_endpoint_sequence_save(struct usbhsh_hpriv *hpriv, 209 struct urb *urb, 210 struct usbhs_pkt *pkt) 211 { 212 int len = urb->actual_length; 213 int maxp = usb_endpoint_maxp(&urb->ep->desc); 214 int t = 0; 215 216 /* DCP is out of sequence control */ 217 if (usb_pipecontrol(urb->pipe)) 218 return; 219 220 /* 221 * renesas_usbhs pipe has a limitation in a number. 222 * So, driver should re-use the limited pipe for each device/endpoint. 223 * DATA0/1 sequence should be saved for it. 224 * see [image of mod_host] 225 * [HARDWARE LIMITATION] 226 */ 227 228 /* 229 * next sequence depends on actual_length 230 * 231 * ex) actual_length = 1147, maxp = 512 232 * data0 : 512 233 * data1 : 512 234 * data0 : 123 235 * data1 is the next sequence 236 */ 237 t = len / maxp; 238 if (len % maxp) 239 t++; 240 if (pkt->zero) 241 t++; 242 t %= 2; 243 244 if (t) 245 usb_dotoggle(urb->dev, 246 usb_pipeendpoint(urb->pipe), 247 usb_pipeout(urb->pipe)); 248 } 249 250 static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv, 251 struct urb *urb); 252 253 static int usbhsh_pipe_attach(struct usbhsh_hpriv *hpriv, 254 struct urb *urb) 255 { 256 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 257 struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep); 258 struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb); 259 struct usbhs_pipe *pipe; 260 struct usb_endpoint_descriptor *desc = &urb->ep->desc; 261 struct device *dev = usbhs_priv_to_dev(priv); 262 unsigned long flags; 263 int dir_in_req = !!usb_pipein(urb->pipe); 264 int is_dcp = usb_endpoint_xfer_control(desc); 265 int i, dir_in; 266 int ret = -EBUSY; 267 268 /******************** spin lock ********************/ 269 usbhs_lock(priv, flags); 270 271 /* 272 * if uep has been attached to pipe, 273 * reuse it 274 */ 275 if (usbhsh_uep_to_pipe(uep)) { 276 ret = 0; 277 goto usbhsh_pipe_attach_done; 278 } 279 280 usbhs_for_each_pipe_with_dcp(pipe, priv, i) { 281 282 /* check pipe type */ 283 if (!usbhs_pipe_type_is(pipe, usb_endpoint_type(desc))) 284 continue; 285 286 /* check pipe direction if normal pipe */ 287 if (!is_dcp) { 288 dir_in = !!usbhs_pipe_is_dir_in(pipe); 289 if (0 != (dir_in - dir_in_req)) 290 continue; 291 } 292 293 /* check pipe is free */ 294 if (usbhsh_pipe_to_uep(pipe)) 295 continue; 296 297 /* 298 * attach pipe to uep 299 * 300 * usbhs_pipe_config_update() should be called after 301 * usbhs_set_device_config() 302 * see 303 * DCPMAXP/PIPEMAXP 304 */ 305 usbhsh_uep_to_pipe(uep) = pipe; 306 usbhsh_pipe_to_uep(pipe) = uep; 307 308 usbhs_pipe_config_update(pipe, 309 usbhsh_device_number(hpriv, udev), 310 usb_endpoint_num(desc), 311 usb_endpoint_maxp(desc)); 312 313 dev_dbg(dev, "%s [%d-%d(%s:%s)]\n", __func__, 314 usbhsh_device_number(hpriv, udev), 315 usb_endpoint_num(desc), 316 usbhs_pipe_name(pipe), 317 dir_in_req ? "in" : "out"); 318 319 ret = 0; 320 break; 321 } 322 323 usbhsh_pipe_attach_done: 324 if (0 == ret) 325 uep->counter++; 326 327 usbhs_unlock(priv, flags); 328 /******************** spin unlock ******************/ 329 330 return ret; 331 } 332 333 static void usbhsh_pipe_detach(struct usbhsh_hpriv *hpriv, 334 struct usbhsh_ep *uep) 335 { 336 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 337 struct usbhs_pipe *pipe; 338 struct device *dev = usbhs_priv_to_dev(priv); 339 unsigned long flags; 340 341 if (unlikely(!uep)) { 342 dev_err(dev, "no uep\n"); 343 return; 344 } 345 346 /******************** spin lock ********************/ 347 usbhs_lock(priv, flags); 348 349 pipe = usbhsh_uep_to_pipe(uep); 350 351 if (unlikely(!pipe)) { 352 dev_err(dev, "uep doens't have pipe\n"); 353 } else if (1 == uep->counter--) { /* last user */ 354 struct usb_host_endpoint *ep = usbhsh_uep_to_ep(uep); 355 struct usbhsh_device *udev = usbhsh_uep_to_udev(uep); 356 357 /* detach pipe from uep */ 358 usbhsh_uep_to_pipe(uep) = NULL; 359 usbhsh_pipe_to_uep(pipe) = NULL; 360 361 dev_dbg(dev, "%s [%d-%d(%s)]\n", __func__, 362 usbhsh_device_number(hpriv, udev), 363 usb_endpoint_num(&ep->desc), 364 usbhs_pipe_name(pipe)); 365 } 366 367 usbhs_unlock(priv, flags); 368 /******************** spin unlock ******************/ 369 } 370 371 /* 372 * endpoint control 373 */ 374 static int usbhsh_endpoint_attach(struct usbhsh_hpriv *hpriv, 375 struct urb *urb, 376 gfp_t mem_flags) 377 { 378 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 379 struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb); 380 struct usb_host_endpoint *ep = urb->ep; 381 struct usbhsh_ep *uep; 382 struct device *dev = usbhs_priv_to_dev(priv); 383 struct usb_endpoint_descriptor *desc = &ep->desc; 384 unsigned long flags; 385 386 uep = kzalloc(sizeof(struct usbhsh_ep), mem_flags); 387 if (!uep) 388 return -ENOMEM; 389 390 /******************** spin lock ********************/ 391 usbhs_lock(priv, flags); 392 393 /* 394 * init endpoint 395 */ 396 uep->counter = 0; 397 INIT_LIST_HEAD(&uep->ep_list); 398 list_add_tail(&uep->ep_list, &udev->ep_list_head); 399 400 usbhsh_uep_to_udev(uep) = udev; 401 usbhsh_uep_to_ep(uep) = ep; 402 usbhsh_ep_to_uep(ep) = uep; 403 404 usbhs_unlock(priv, flags); 405 /******************** spin unlock ******************/ 406 407 dev_dbg(dev, "%s [%d-%d]\n", __func__, 408 usbhsh_device_number(hpriv, udev), 409 usb_endpoint_num(desc)); 410 411 return 0; 412 } 413 414 static void usbhsh_endpoint_detach(struct usbhsh_hpriv *hpriv, 415 struct usb_host_endpoint *ep) 416 { 417 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 418 struct device *dev = usbhs_priv_to_dev(priv); 419 struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep); 420 unsigned long flags; 421 422 if (!uep) 423 return; 424 425 dev_dbg(dev, "%s [%d-%d]\n", __func__, 426 usbhsh_device_number(hpriv, usbhsh_uep_to_udev(uep)), 427 usb_endpoint_num(&ep->desc)); 428 429 if (usbhsh_uep_to_pipe(uep)) 430 usbhsh_pipe_detach(hpriv, uep); 431 432 /******************** spin lock ********************/ 433 usbhs_lock(priv, flags); 434 435 /* remove this endpoint from udev */ 436 list_del_init(&uep->ep_list); 437 438 usbhsh_uep_to_udev(uep) = NULL; 439 usbhsh_uep_to_ep(uep) = NULL; 440 usbhsh_ep_to_uep(ep) = NULL; 441 442 usbhs_unlock(priv, flags); 443 /******************** spin unlock ******************/ 444 445 kfree(uep); 446 } 447 448 static void usbhsh_endpoint_detach_all(struct usbhsh_hpriv *hpriv, 449 struct usbhsh_device *udev) 450 { 451 struct usbhsh_ep *uep, *next; 452 453 list_for_each_entry_safe(uep, next, &udev->ep_list_head, ep_list) 454 usbhsh_endpoint_detach(hpriv, usbhsh_uep_to_ep(uep)); 455 } 456 457 /* 458 * device control 459 */ 460 static int usbhsh_connected_to_rhdev(struct usb_hcd *hcd, 461 struct usbhsh_device *udev) 462 { 463 struct usb_device *usbv = usbhsh_udev_to_usbv(udev); 464 465 return hcd->self.root_hub == usbv->parent; 466 } 467 468 static int usbhsh_device_has_endpoint(struct usbhsh_device *udev) 469 { 470 return !list_empty(&udev->ep_list_head); 471 } 472 473 static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv, 474 struct urb *urb) 475 { 476 struct usb_device *usbv = usbhsh_urb_to_usbv(urb); 477 struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv); 478 479 /* usbhsh_device_attach() is still not called */ 480 if (!udev) 481 return NULL; 482 483 /* if it is device0, return it */ 484 if (0 == usb_pipedevice(urb->pipe)) 485 return usbhsh_device0(hpriv); 486 487 /* return attached device */ 488 return udev; 489 } 490 491 static struct usbhsh_device *usbhsh_device_attach(struct usbhsh_hpriv *hpriv, 492 struct urb *urb) 493 { 494 struct usbhsh_device *udev = NULL; 495 struct usbhsh_device *udev0 = usbhsh_device0(hpriv); 496 struct usbhsh_device *pos; 497 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); 498 struct device *dev = usbhsh_hcd_to_dev(hcd); 499 struct usb_device *usbv = usbhsh_urb_to_usbv(urb); 500 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 501 unsigned long flags; 502 u16 upphub, hubport; 503 int i; 504 505 /* 506 * This function should be called only while urb is pointing to device0. 507 * It will attach unused usbhsh_device to urb (usbv), 508 * and initialize device0. 509 * You can use usbhsh_device_get() to get "current" udev, 510 * and usbhsh_usbv_to_udev() is for "attached" udev. 511 */ 512 if (0 != usb_pipedevice(urb->pipe)) { 513 dev_err(dev, "%s fail: urb isn't pointing device0\n", __func__); 514 return NULL; 515 } 516 517 /******************** spin lock ********************/ 518 usbhs_lock(priv, flags); 519 520 /* 521 * find unused device 522 */ 523 usbhsh_for_each_udev(pos, hpriv, i) { 524 if (usbhsh_udev_is_used(pos)) 525 continue; 526 udev = pos; 527 break; 528 } 529 530 if (udev) { 531 /* 532 * usbhsh_usbv_to_udev() 533 * usbhsh_udev_to_usbv() 534 * will be enable 535 */ 536 dev_set_drvdata(&usbv->dev, udev); 537 udev->usbv = usbv; 538 } 539 540 usbhs_unlock(priv, flags); 541 /******************** spin unlock ******************/ 542 543 if (!udev) { 544 dev_err(dev, "no free usbhsh_device\n"); 545 return NULL; 546 } 547 548 if (usbhsh_device_has_endpoint(udev)) { 549 dev_warn(dev, "udev have old endpoint\n"); 550 usbhsh_endpoint_detach_all(hpriv, udev); 551 } 552 553 if (usbhsh_device_has_endpoint(udev0)) { 554 dev_warn(dev, "udev0 have old endpoint\n"); 555 usbhsh_endpoint_detach_all(hpriv, udev0); 556 } 557 558 /* uep will be attached */ 559 INIT_LIST_HEAD(&udev0->ep_list_head); 560 INIT_LIST_HEAD(&udev->ep_list_head); 561 562 /* 563 * set device0 config 564 */ 565 usbhs_set_device_config(priv, 566 0, 0, 0, usbv->speed); 567 568 /* 569 * set new device config 570 */ 571 upphub = 0; 572 hubport = 0; 573 if (!usbhsh_connected_to_rhdev(hcd, udev)) { 574 /* if udev is not connected to rhdev, it means parent is Hub */ 575 struct usbhsh_device *parent = usbhsh_device_parent(udev); 576 577 upphub = usbhsh_device_number(hpriv, parent); 578 hubport = usbhsh_device_hubport(udev); 579 580 dev_dbg(dev, "%s connecte to Hub [%d:%d](%p)\n", __func__, 581 upphub, hubport, parent); 582 } 583 584 usbhs_set_device_config(priv, 585 usbhsh_device_number(hpriv, udev), 586 upphub, hubport, usbv->speed); 587 588 dev_dbg(dev, "%s [%d](%p)\n", __func__, 589 usbhsh_device_number(hpriv, udev), udev); 590 591 return udev; 592 } 593 594 static void usbhsh_device_detach(struct usbhsh_hpriv *hpriv, 595 struct usbhsh_device *udev) 596 { 597 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); 598 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 599 struct device *dev = usbhsh_hcd_to_dev(hcd); 600 struct usb_device *usbv = usbhsh_udev_to_usbv(udev); 601 unsigned long flags; 602 603 dev_dbg(dev, "%s [%d](%p)\n", __func__, 604 usbhsh_device_number(hpriv, udev), udev); 605 606 if (usbhsh_device_has_endpoint(udev)) { 607 dev_warn(dev, "udev still have endpoint\n"); 608 usbhsh_endpoint_detach_all(hpriv, udev); 609 } 610 611 /* 612 * There is nothing to do if it is device0. 613 * see 614 * usbhsh_device_attach() 615 * usbhsh_device_get() 616 */ 617 if (0 == usbhsh_device_number(hpriv, udev)) 618 return; 619 620 /******************** spin lock ********************/ 621 usbhs_lock(priv, flags); 622 623 /* 624 * usbhsh_usbv_to_udev() 625 * usbhsh_udev_to_usbv() 626 * will be disable 627 */ 628 dev_set_drvdata(&usbv->dev, NULL); 629 udev->usbv = NULL; 630 631 usbhs_unlock(priv, flags); 632 /******************** spin unlock ******************/ 633 } 634 635 /* 636 * queue push/pop 637 */ 638 static void usbhsh_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt) 639 { 640 struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt); 641 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 642 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); 643 struct urb *urb = ureq->urb; 644 struct device *dev = usbhs_priv_to_dev(priv); 645 int status = 0; 646 647 dev_dbg(dev, "%s\n", __func__); 648 649 if (!urb) { 650 dev_warn(dev, "pkt doesn't have urb\n"); 651 return; 652 } 653 654 if (!usbhsh_is_running(hpriv)) 655 status = -ESHUTDOWN; 656 657 urb->actual_length = pkt->actual; 658 659 usbhsh_endpoint_sequence_save(hpriv, urb, pkt); 660 usbhsh_ureq_free(hpriv, ureq); 661 662 usbhsh_pipe_detach(hpriv, usbhsh_ep_to_uep(urb->ep)); 663 664 usb_hcd_unlink_urb_from_ep(hcd, urb); 665 usb_hcd_giveback_urb(hcd, urb, status); 666 } 667 668 static int usbhsh_queue_push(struct usb_hcd *hcd, 669 struct urb *urb, 670 gfp_t mem_flags) 671 { 672 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd); 673 struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep); 674 struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep); 675 struct device *dev = usbhsh_hcd_to_dev(hcd); 676 struct usbhsh_request *ureq; 677 void *buf; 678 int len, sequence; 679 680 if (usb_pipeisoc(urb->pipe)) { 681 dev_err(dev, "pipe iso is not supported now\n"); 682 return -EIO; 683 } 684 685 /* this ureq will be freed on usbhsh_queue_done() */ 686 ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags); 687 if (unlikely(!ureq)) { 688 dev_err(dev, "ureq alloc fail\n"); 689 return -ENOMEM; 690 } 691 692 if (usb_pipein(urb->pipe)) 693 pipe->handler = &usbhs_fifo_dma_pop_handler; 694 else 695 pipe->handler = &usbhs_fifo_dma_push_handler; 696 697 buf = (void *)(urb->transfer_buffer + urb->actual_length); 698 len = urb->transfer_buffer_length - urb->actual_length; 699 700 sequence = usb_gettoggle(urb->dev, 701 usb_pipeendpoint(urb->pipe), 702 usb_pipeout(urb->pipe)); 703 704 dev_dbg(dev, "%s\n", __func__); 705 usbhs_pkt_push(pipe, &ureq->pkt, usbhsh_queue_done, 706 buf, len, (urb->transfer_flags & URB_ZERO_PACKET), 707 sequence); 708 709 usbhs_pkt_start(pipe); 710 711 return 0; 712 } 713 714 static void usbhsh_queue_force_pop(struct usbhs_priv *priv, 715 struct usbhs_pipe *pipe) 716 { 717 struct usbhs_pkt *pkt; 718 719 while (1) { 720 pkt = usbhs_pkt_pop(pipe, NULL); 721 if (!pkt) 722 break; 723 724 /* 725 * if all packet are gone, usbhsh_endpoint_disable() 726 * will be called. 727 * then, attached device/endpoint/pipe will be detached 728 */ 729 usbhsh_queue_done(priv, pkt); 730 } 731 } 732 733 static void usbhsh_queue_force_pop_all(struct usbhs_priv *priv) 734 { 735 struct usbhs_pipe *pos; 736 int i; 737 738 usbhs_for_each_pipe_with_dcp(pos, priv, i) 739 usbhsh_queue_force_pop(priv, pos); 740 } 741 742 /* 743 * DCP setup stage 744 */ 745 static int usbhsh_is_request_address(struct urb *urb) 746 { 747 struct usb_ctrlrequest *req; 748 749 req = (struct usb_ctrlrequest *)urb->setup_packet; 750 751 if ((DeviceOutRequest == req->bRequestType << 8) && 752 (USB_REQ_SET_ADDRESS == req->bRequest)) 753 return 1; 754 else 755 return 0; 756 } 757 758 static void usbhsh_setup_stage_packet_push(struct usbhsh_hpriv *hpriv, 759 struct urb *urb, 760 struct usbhs_pipe *pipe) 761 { 762 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 763 struct usb_ctrlrequest req; 764 struct device *dev = usbhs_priv_to_dev(priv); 765 766 /* 767 * wait setup packet ACK 768 * see 769 * usbhsh_irq_setup_ack() 770 * usbhsh_irq_setup_err() 771 */ 772 init_completion(&hpriv->setup_ack_done); 773 774 /* copy original request */ 775 memcpy(&req, urb->setup_packet, sizeof(struct usb_ctrlrequest)); 776 777 /* 778 * renesas_usbhs can not use original usb address. 779 * see HARDWARE LIMITATION. 780 * modify usb address here to use attached device. 781 * see usbhsh_device_attach() 782 */ 783 if (usbhsh_is_request_address(urb)) { 784 struct usb_device *usbv = usbhsh_urb_to_usbv(urb); 785 struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv); 786 787 /* udev is a attached device */ 788 req.wValue = usbhsh_device_number(hpriv, udev); 789 dev_dbg(dev, "create new address - %d\n", req.wValue); 790 } 791 792 /* set request */ 793 usbhs_usbreq_set_val(priv, &req); 794 795 /* 796 * wait setup packet ACK 797 */ 798 wait_for_completion(&hpriv->setup_ack_done); 799 800 dev_dbg(dev, "%s done\n", __func__); 801 } 802 803 /* 804 * DCP data stage 805 */ 806 static void usbhsh_data_stage_packet_done(struct usbhs_priv *priv, 807 struct usbhs_pkt *pkt) 808 { 809 struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt); 810 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 811 812 /* this ureq was connected to urb when usbhsh_urb_enqueue() */ 813 814 usbhsh_ureq_free(hpriv, ureq); 815 } 816 817 static int usbhsh_data_stage_packet_push(struct usbhsh_hpriv *hpriv, 818 struct urb *urb, 819 struct usbhs_pipe *pipe, 820 gfp_t mem_flags) 821 822 { 823 struct usbhsh_request *ureq; 824 825 /* this ureq will be freed on usbhsh_data_stage_packet_done() */ 826 ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags); 827 if (unlikely(!ureq)) 828 return -ENOMEM; 829 830 if (usb_pipein(urb->pipe)) 831 pipe->handler = &usbhs_dcp_data_stage_in_handler; 832 else 833 pipe->handler = &usbhs_dcp_data_stage_out_handler; 834 835 usbhs_pkt_push(pipe, &ureq->pkt, 836 usbhsh_data_stage_packet_done, 837 urb->transfer_buffer, 838 urb->transfer_buffer_length, 839 (urb->transfer_flags & URB_ZERO_PACKET), 840 -1); 841 842 return 0; 843 } 844 845 /* 846 * DCP status stage 847 */ 848 static int usbhsh_status_stage_packet_push(struct usbhsh_hpriv *hpriv, 849 struct urb *urb, 850 struct usbhs_pipe *pipe, 851 gfp_t mem_flags) 852 { 853 struct usbhsh_request *ureq; 854 855 /* This ureq will be freed on usbhsh_queue_done() */ 856 ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags); 857 if (unlikely(!ureq)) 858 return -ENOMEM; 859 860 if (usb_pipein(urb->pipe)) 861 pipe->handler = &usbhs_dcp_status_stage_in_handler; 862 else 863 pipe->handler = &usbhs_dcp_status_stage_out_handler; 864 865 usbhs_pkt_push(pipe, &ureq->pkt, 866 usbhsh_queue_done, 867 NULL, 868 urb->transfer_buffer_length, 869 0, -1); 870 871 return 0; 872 } 873 874 static int usbhsh_dcp_queue_push(struct usb_hcd *hcd, 875 struct urb *urb, 876 gfp_t mflags) 877 { 878 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd); 879 struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep); 880 struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep); 881 struct device *dev = usbhsh_hcd_to_dev(hcd); 882 int ret; 883 884 dev_dbg(dev, "%s\n", __func__); 885 886 /* 887 * setup stage 888 * 889 * usbhsh_send_setup_stage_packet() wait SACK/SIGN 890 */ 891 usbhsh_setup_stage_packet_push(hpriv, urb, pipe); 892 893 /* 894 * data stage 895 * 896 * It is pushed only when urb has buffer. 897 */ 898 if (urb->transfer_buffer_length) { 899 ret = usbhsh_data_stage_packet_push(hpriv, urb, pipe, mflags); 900 if (ret < 0) { 901 dev_err(dev, "data stage failed\n"); 902 return ret; 903 } 904 } 905 906 /* 907 * status stage 908 */ 909 ret = usbhsh_status_stage_packet_push(hpriv, urb, pipe, mflags); 910 if (ret < 0) { 911 dev_err(dev, "status stage failed\n"); 912 return ret; 913 } 914 915 /* 916 * start pushed packets 917 */ 918 usbhs_pkt_start(pipe); 919 920 return 0; 921 } 922 923 /* 924 * dma map functions 925 */ 926 static int usbhsh_dma_map_ctrl(struct device *dma_dev, struct usbhs_pkt *pkt, 927 int map) 928 { 929 if (map) { 930 struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt); 931 struct urb *urb = ureq->urb; 932 933 /* it can not use scatter/gather */ 934 if (urb->num_sgs) 935 return -EINVAL; 936 937 pkt->dma = urb->transfer_dma; 938 if (!pkt->dma) 939 return -EINVAL; 940 } 941 942 return 0; 943 } 944 945 /* 946 * for hc_driver 947 */ 948 static int usbhsh_host_start(struct usb_hcd *hcd) 949 { 950 return 0; 951 } 952 953 static void usbhsh_host_stop(struct usb_hcd *hcd) 954 { 955 } 956 957 static int usbhsh_urb_enqueue(struct usb_hcd *hcd, 958 struct urb *urb, 959 gfp_t mem_flags) 960 { 961 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd); 962 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 963 struct device *dev = usbhs_priv_to_dev(priv); 964 struct usb_host_endpoint *ep = urb->ep; 965 struct usbhsh_device *new_udev = NULL; 966 int is_dir_in = usb_pipein(urb->pipe); 967 int ret; 968 969 dev_dbg(dev, "%s (%s)\n", __func__, is_dir_in ? "in" : "out"); 970 971 if (!usbhsh_is_running(hpriv)) { 972 ret = -EIO; 973 dev_err(dev, "host is not running\n"); 974 goto usbhsh_urb_enqueue_error_not_linked; 975 } 976 977 ret = usb_hcd_link_urb_to_ep(hcd, urb); 978 if (ret) { 979 dev_err(dev, "urb link failed\n"); 980 goto usbhsh_urb_enqueue_error_not_linked; 981 } 982 983 /* 984 * attach udev if needed 985 * see [image of mod_host] 986 */ 987 if (!usbhsh_device_get(hpriv, urb)) { 988 new_udev = usbhsh_device_attach(hpriv, urb); 989 if (!new_udev) { 990 ret = -EIO; 991 dev_err(dev, "device attach failed\n"); 992 goto usbhsh_urb_enqueue_error_not_linked; 993 } 994 } 995 996 /* 997 * attach endpoint if needed 998 * see [image of mod_host] 999 */ 1000 if (!usbhsh_ep_to_uep(ep)) { 1001 ret = usbhsh_endpoint_attach(hpriv, urb, mem_flags); 1002 if (ret < 0) { 1003 dev_err(dev, "endpoint attach failed\n"); 1004 goto usbhsh_urb_enqueue_error_free_device; 1005 } 1006 } 1007 1008 /* 1009 * attach pipe to endpoint 1010 * see [image of mod_host] 1011 */ 1012 ret = usbhsh_pipe_attach(hpriv, urb); 1013 if (ret < 0) { 1014 dev_err(dev, "pipe attach failed\n"); 1015 goto usbhsh_urb_enqueue_error_free_endpoint; 1016 } 1017 1018 /* 1019 * push packet 1020 */ 1021 if (usb_pipecontrol(urb->pipe)) 1022 ret = usbhsh_dcp_queue_push(hcd, urb, mem_flags); 1023 else 1024 ret = usbhsh_queue_push(hcd, urb, mem_flags); 1025 1026 return ret; 1027 1028 usbhsh_urb_enqueue_error_free_endpoint: 1029 usbhsh_endpoint_detach(hpriv, ep); 1030 usbhsh_urb_enqueue_error_free_device: 1031 if (new_udev) 1032 usbhsh_device_detach(hpriv, new_udev); 1033 usbhsh_urb_enqueue_error_not_linked: 1034 1035 dev_dbg(dev, "%s error\n", __func__); 1036 1037 return ret; 1038 } 1039 1040 static int usbhsh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) 1041 { 1042 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd); 1043 struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb); 1044 1045 if (ureq) { 1046 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 1047 struct usbhs_pkt *pkt = &ureq->pkt; 1048 1049 usbhs_pkt_pop(pkt->pipe, pkt); 1050 usbhsh_queue_done(priv, pkt); 1051 } 1052 1053 return 0; 1054 } 1055 1056 static void usbhsh_endpoint_disable(struct usb_hcd *hcd, 1057 struct usb_host_endpoint *ep) 1058 { 1059 struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep); 1060 struct usbhsh_device *udev; 1061 struct usbhsh_hpriv *hpriv; 1062 1063 /* 1064 * this function might be called manytimes by same hcd/ep 1065 * in-endpoint == out-endpoint if ep == dcp. 1066 */ 1067 if (!uep) 1068 return; 1069 1070 udev = usbhsh_uep_to_udev(uep); 1071 hpriv = usbhsh_hcd_to_hpriv(hcd); 1072 1073 usbhsh_endpoint_detach(hpriv, ep); 1074 1075 /* 1076 * if there is no endpoint, 1077 * free device 1078 */ 1079 if (!usbhsh_device_has_endpoint(udev)) 1080 usbhsh_device_detach(hpriv, udev); 1081 } 1082 1083 static int usbhsh_hub_status_data(struct usb_hcd *hcd, char *buf) 1084 { 1085 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd); 1086 int roothub_id = 1; /* only 1 root hub */ 1087 1088 /* 1089 * does port stat was changed ? 1090 * check USB_PORT_STAT_C_xxx << 16 1091 */ 1092 if (usbhsh_port_stat_get(hpriv) & 0xFFFF0000) 1093 *buf = (1 << roothub_id); 1094 else 1095 *buf = 0; 1096 1097 return !!(*buf); 1098 } 1099 1100 static int __usbhsh_hub_hub_feature(struct usbhsh_hpriv *hpriv, 1101 u16 typeReq, u16 wValue, 1102 u16 wIndex, char *buf, u16 wLength) 1103 { 1104 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 1105 struct device *dev = usbhs_priv_to_dev(priv); 1106 1107 switch (wValue) { 1108 case C_HUB_OVER_CURRENT: 1109 case C_HUB_LOCAL_POWER: 1110 dev_dbg(dev, "%s :: C_HUB_xx\n", __func__); 1111 return 0; 1112 } 1113 1114 return -EPIPE; 1115 } 1116 1117 static int __usbhsh_hub_port_feature(struct usbhsh_hpriv *hpriv, 1118 u16 typeReq, u16 wValue, 1119 u16 wIndex, char *buf, u16 wLength) 1120 { 1121 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 1122 struct device *dev = usbhs_priv_to_dev(priv); 1123 int enable = (typeReq == SetPortFeature); 1124 int speed, i, timeout = 128; 1125 int roothub_id = 1; /* only 1 root hub */ 1126 1127 /* common error */ 1128 if (wIndex > roothub_id || wLength != 0) 1129 return -EPIPE; 1130 1131 /* check wValue */ 1132 switch (wValue) { 1133 case USB_PORT_FEAT_POWER: 1134 usbhs_vbus_ctrl(priv, enable); 1135 dev_dbg(dev, "%s :: USB_PORT_FEAT_POWER\n", __func__); 1136 break; 1137 1138 case USB_PORT_FEAT_ENABLE: 1139 case USB_PORT_FEAT_SUSPEND: 1140 case USB_PORT_FEAT_C_ENABLE: 1141 case USB_PORT_FEAT_C_SUSPEND: 1142 case USB_PORT_FEAT_C_CONNECTION: 1143 case USB_PORT_FEAT_C_OVER_CURRENT: 1144 case USB_PORT_FEAT_C_RESET: 1145 dev_dbg(dev, "%s :: USB_PORT_FEAT_xxx\n", __func__); 1146 break; 1147 1148 case USB_PORT_FEAT_RESET: 1149 if (!enable) 1150 break; 1151 1152 usbhsh_port_stat_clear(hpriv, 1153 USB_PORT_STAT_HIGH_SPEED | 1154 USB_PORT_STAT_LOW_SPEED); 1155 1156 usbhsh_queue_force_pop_all(priv); 1157 1158 usbhs_bus_send_reset(priv); 1159 msleep(20); 1160 usbhs_bus_send_sof_enable(priv); 1161 1162 for (i = 0; i < timeout ; i++) { 1163 switch (usbhs_bus_get_speed(priv)) { 1164 case USB_SPEED_LOW: 1165 speed = USB_PORT_STAT_LOW_SPEED; 1166 goto got_usb_bus_speed; 1167 case USB_SPEED_HIGH: 1168 speed = USB_PORT_STAT_HIGH_SPEED; 1169 goto got_usb_bus_speed; 1170 case USB_SPEED_FULL: 1171 speed = 0; 1172 goto got_usb_bus_speed; 1173 } 1174 1175 msleep(20); 1176 } 1177 return -EPIPE; 1178 1179 got_usb_bus_speed: 1180 usbhsh_port_stat_set(hpriv, speed); 1181 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_ENABLE); 1182 1183 dev_dbg(dev, "%s :: USB_PORT_FEAT_RESET (speed = %d)\n", 1184 __func__, speed); 1185 1186 /* status change is not needed */ 1187 return 0; 1188 1189 default: 1190 return -EPIPE; 1191 } 1192 1193 /* set/clear status */ 1194 if (enable) 1195 usbhsh_port_stat_set(hpriv, (1 << wValue)); 1196 else 1197 usbhsh_port_stat_clear(hpriv, (1 << wValue)); 1198 1199 return 0; 1200 } 1201 1202 static int __usbhsh_hub_get_status(struct usbhsh_hpriv *hpriv, 1203 u16 typeReq, u16 wValue, 1204 u16 wIndex, char *buf, u16 wLength) 1205 { 1206 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 1207 struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf; 1208 struct device *dev = usbhs_priv_to_dev(priv); 1209 int roothub_id = 1; /* only 1 root hub */ 1210 1211 switch (typeReq) { 1212 case GetHubStatus: 1213 dev_dbg(dev, "%s :: GetHubStatus\n", __func__); 1214 1215 *buf = 0x00; 1216 break; 1217 1218 case GetPortStatus: 1219 if (wIndex != roothub_id) 1220 return -EPIPE; 1221 1222 dev_dbg(dev, "%s :: GetPortStatus\n", __func__); 1223 *(__le32 *)buf = cpu_to_le32(usbhsh_port_stat_get(hpriv)); 1224 break; 1225 1226 case GetHubDescriptor: 1227 desc->bDescriptorType = USB_DT_HUB; 1228 desc->bHubContrCurrent = 0; 1229 desc->bNbrPorts = roothub_id; 1230 desc->bDescLength = 9; 1231 desc->bPwrOn2PwrGood = 0; 1232 desc->wHubCharacteristics = 1233 cpu_to_le16(HUB_CHAR_INDV_PORT_LPSM | HUB_CHAR_NO_OCPM); 1234 desc->u.hs.DeviceRemovable[0] = (roothub_id << 1); 1235 desc->u.hs.DeviceRemovable[1] = ~0; 1236 dev_dbg(dev, "%s :: GetHubDescriptor\n", __func__); 1237 break; 1238 } 1239 1240 return 0; 1241 } 1242 1243 static int usbhsh_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, 1244 u16 wIndex, char *buf, u16 wLength) 1245 { 1246 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd); 1247 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 1248 struct device *dev = usbhs_priv_to_dev(priv); 1249 int ret = -EPIPE; 1250 1251 switch (typeReq) { 1252 1253 /* Hub Feature */ 1254 case ClearHubFeature: 1255 case SetHubFeature: 1256 ret = __usbhsh_hub_hub_feature(hpriv, typeReq, 1257 wValue, wIndex, buf, wLength); 1258 break; 1259 1260 /* Port Feature */ 1261 case SetPortFeature: 1262 case ClearPortFeature: 1263 ret = __usbhsh_hub_port_feature(hpriv, typeReq, 1264 wValue, wIndex, buf, wLength); 1265 break; 1266 1267 /* Get status */ 1268 case GetHubStatus: 1269 case GetPortStatus: 1270 case GetHubDescriptor: 1271 ret = __usbhsh_hub_get_status(hpriv, typeReq, 1272 wValue, wIndex, buf, wLength); 1273 break; 1274 } 1275 1276 dev_dbg(dev, "typeReq = %x, ret = %d, port_stat = %x\n", 1277 typeReq, ret, usbhsh_port_stat_get(hpriv)); 1278 1279 return ret; 1280 } 1281 1282 static int usbhsh_bus_nop(struct usb_hcd *hcd) 1283 { 1284 /* nothing to do */ 1285 return 0; 1286 } 1287 1288 static struct hc_driver usbhsh_driver = { 1289 .description = usbhsh_hcd_name, 1290 .hcd_priv_size = sizeof(struct usbhsh_hpriv), 1291 1292 /* 1293 * generic hardware linkage 1294 */ 1295 .flags = HCD_USB2, 1296 1297 .start = usbhsh_host_start, 1298 .stop = usbhsh_host_stop, 1299 1300 /* 1301 * managing i/o requests and associated device resources 1302 */ 1303 .urb_enqueue = usbhsh_urb_enqueue, 1304 .urb_dequeue = usbhsh_urb_dequeue, 1305 .endpoint_disable = usbhsh_endpoint_disable, 1306 1307 /* 1308 * root hub 1309 */ 1310 .hub_status_data = usbhsh_hub_status_data, 1311 .hub_control = usbhsh_hub_control, 1312 .bus_suspend = usbhsh_bus_nop, 1313 .bus_resume = usbhsh_bus_nop, 1314 }; 1315 1316 /* 1317 * interrupt functions 1318 */ 1319 static int usbhsh_irq_attch(struct usbhs_priv *priv, 1320 struct usbhs_irq_state *irq_state) 1321 { 1322 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 1323 struct device *dev = usbhs_priv_to_dev(priv); 1324 1325 dev_dbg(dev, "device attached\n"); 1326 1327 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_CONNECTION); 1328 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16); 1329 1330 /* 1331 * attch interrupt might happen infinitely on some device 1332 * (on self power USB hub ?) 1333 * disable it here. 1334 * 1335 * usbhsh_is_running() becomes effective 1336 * according to this process. 1337 * see 1338 * usbhsh_is_running() 1339 * usbhsh_urb_enqueue() 1340 */ 1341 hpriv->mod.irq_attch = NULL; 1342 usbhs_irq_callback_update(priv, &hpriv->mod); 1343 1344 return 0; 1345 } 1346 1347 static int usbhsh_irq_dtch(struct usbhs_priv *priv, 1348 struct usbhs_irq_state *irq_state) 1349 { 1350 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 1351 struct device *dev = usbhs_priv_to_dev(priv); 1352 1353 dev_dbg(dev, "device detached\n"); 1354 1355 usbhsh_port_stat_clear(hpriv, USB_PORT_STAT_CONNECTION); 1356 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16); 1357 1358 /* 1359 * enable attch interrupt again 1360 * 1361 * usbhsh_is_running() becomes invalid 1362 * according to this process. 1363 * see 1364 * usbhsh_is_running() 1365 * usbhsh_urb_enqueue() 1366 */ 1367 hpriv->mod.irq_attch = usbhsh_irq_attch; 1368 usbhs_irq_callback_update(priv, &hpriv->mod); 1369 1370 /* 1371 * usbhsh_queue_force_pop_all() should be called 1372 * after usbhsh_is_running() becomes invalid. 1373 */ 1374 usbhsh_queue_force_pop_all(priv); 1375 1376 return 0; 1377 } 1378 1379 static int usbhsh_irq_setup_ack(struct usbhs_priv *priv, 1380 struct usbhs_irq_state *irq_state) 1381 { 1382 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 1383 struct device *dev = usbhs_priv_to_dev(priv); 1384 1385 dev_dbg(dev, "setup packet OK\n"); 1386 1387 complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */ 1388 1389 return 0; 1390 } 1391 1392 static int usbhsh_irq_setup_err(struct usbhs_priv *priv, 1393 struct usbhs_irq_state *irq_state) 1394 { 1395 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 1396 struct device *dev = usbhs_priv_to_dev(priv); 1397 1398 dev_dbg(dev, "setup packet Err\n"); 1399 1400 complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */ 1401 1402 return 0; 1403 } 1404 1405 /* 1406 * module start/stop 1407 */ 1408 static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv) 1409 { 1410 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 1411 struct usbhs_pipe *pipe; 1412 struct renesas_usbhs_driver_pipe_config *pipe_configs = 1413 usbhs_get_dparam(priv, pipe_configs); 1414 int pipe_size = usbhs_get_dparam(priv, pipe_size); 1415 int old_type, dir_in, i; 1416 1417 /* init all pipe */ 1418 old_type = USB_ENDPOINT_XFER_CONTROL; 1419 for (i = 0; i < pipe_size; i++) { 1420 1421 /* 1422 * data "output" will be finished as soon as possible, 1423 * but there is no guaranty at data "input" case. 1424 * 1425 * "input" needs "standby" pipe. 1426 * So, "input" direction pipe > "output" direction pipe 1427 * is good idea. 1428 * 1429 * 1st USB_ENDPOINT_XFER_xxx will be output direction, 1430 * and the other will be input direction here. 1431 * 1432 * ex) 1433 * ... 1434 * USB_ENDPOINT_XFER_ISOC -> dir out 1435 * USB_ENDPOINT_XFER_ISOC -> dir in 1436 * USB_ENDPOINT_XFER_BULK -> dir out 1437 * USB_ENDPOINT_XFER_BULK -> dir in 1438 * USB_ENDPOINT_XFER_BULK -> dir in 1439 * ... 1440 */ 1441 dir_in = (pipe_configs[i].type == old_type); 1442 old_type = pipe_configs[i].type; 1443 1444 if (USB_ENDPOINT_XFER_CONTROL == pipe_configs[i].type) { 1445 pipe = usbhs_dcp_malloc(priv); 1446 usbhsh_hpriv_to_dcp(hpriv) = pipe; 1447 } else { 1448 pipe = usbhs_pipe_malloc(priv, 1449 pipe_configs[i].type, 1450 dir_in); 1451 } 1452 1453 pipe->mod_private = NULL; 1454 } 1455 } 1456 1457 static int usbhsh_start(struct usbhs_priv *priv) 1458 { 1459 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 1460 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); 1461 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 1462 struct device *dev = usbhs_priv_to_dev(priv); 1463 int ret; 1464 1465 /* add hcd */ 1466 ret = usb_add_hcd(hcd, 0, 0); 1467 if (ret < 0) 1468 return 0; 1469 device_wakeup_enable(hcd->self.controller); 1470 1471 /* 1472 * pipe initialize and enable DCP 1473 */ 1474 usbhs_fifo_init(priv); 1475 usbhs_pipe_init(priv, 1476 usbhsh_dma_map_ctrl); 1477 usbhsh_pipe_init_for_host(priv); 1478 1479 /* 1480 * system config enble 1481 * - HI speed 1482 * - host 1483 * - usb module 1484 */ 1485 usbhs_sys_host_ctrl(priv, 1); 1486 1487 /* 1488 * enable irq callback 1489 */ 1490 mod->irq_attch = usbhsh_irq_attch; 1491 mod->irq_dtch = usbhsh_irq_dtch; 1492 mod->irq_sack = usbhsh_irq_setup_ack; 1493 mod->irq_sign = usbhsh_irq_setup_err; 1494 usbhs_irq_callback_update(priv, mod); 1495 1496 dev_dbg(dev, "start host\n"); 1497 1498 return ret; 1499 } 1500 1501 static int usbhsh_stop(struct usbhs_priv *priv) 1502 { 1503 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 1504 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); 1505 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 1506 struct device *dev = usbhs_priv_to_dev(priv); 1507 1508 /* 1509 * disable irq callback 1510 */ 1511 mod->irq_attch = NULL; 1512 mod->irq_dtch = NULL; 1513 mod->irq_sack = NULL; 1514 mod->irq_sign = NULL; 1515 usbhs_irq_callback_update(priv, mod); 1516 1517 usb_remove_hcd(hcd); 1518 1519 /* disable sys */ 1520 usbhs_sys_host_ctrl(priv, 0); 1521 1522 dev_dbg(dev, "quit host\n"); 1523 1524 return 0; 1525 } 1526 1527 int usbhs_mod_host_probe(struct usbhs_priv *priv) 1528 { 1529 struct usbhsh_hpriv *hpriv; 1530 struct usb_hcd *hcd; 1531 struct usbhsh_device *udev; 1532 struct device *dev = usbhs_priv_to_dev(priv); 1533 int i; 1534 1535 /* initialize hcd */ 1536 hcd = usb_create_hcd(&usbhsh_driver, dev, usbhsh_hcd_name); 1537 if (!hcd) { 1538 dev_err(dev, "Failed to create hcd\n"); 1539 return -ENOMEM; 1540 } 1541 hcd->has_tt = 1; /* for low/full speed */ 1542 1543 /* 1544 * CAUTION 1545 * 1546 * There is no guarantee that it is possible to access usb module here. 1547 * Don't accesses to it. 1548 * The accesse will be enable after "usbhsh_start" 1549 */ 1550 1551 hpriv = usbhsh_hcd_to_hpriv(hcd); 1552 1553 /* 1554 * register itself 1555 */ 1556 usbhs_mod_register(priv, &hpriv->mod, USBHS_HOST); 1557 1558 /* init hpriv */ 1559 hpriv->mod.name = "host"; 1560 hpriv->mod.start = usbhsh_start; 1561 hpriv->mod.stop = usbhsh_stop; 1562 usbhsh_port_stat_init(hpriv); 1563 1564 /* init all device */ 1565 usbhsh_for_each_udev_with_dev0(udev, hpriv, i) { 1566 udev->usbv = NULL; 1567 INIT_LIST_HEAD(&udev->ep_list_head); 1568 } 1569 1570 dev_info(dev, "host probed\n"); 1571 1572 return 0; 1573 } 1574 1575 int usbhs_mod_host_remove(struct usbhs_priv *priv) 1576 { 1577 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 1578 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); 1579 1580 usb_put_hcd(hcd); 1581 1582 return 0; 1583 } 1584