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 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 170 struct device *dev = usbhs_priv_to_dev(priv); 171 172 ureq = kzalloc(sizeof(struct usbhsh_request), mem_flags); 173 if (!ureq) { 174 dev_err(dev, "ureq alloc fail\n"); 175 return NULL; 176 } 177 178 usbhs_pkt_init(&ureq->pkt); 179 ureq->urb = urb; 180 usbhsh_urb_to_ureq(urb) = ureq; 181 182 return ureq; 183 } 184 185 static void usbhsh_ureq_free(struct usbhsh_hpriv *hpriv, 186 struct usbhsh_request *ureq) 187 { 188 usbhsh_urb_to_ureq(ureq->urb) = NULL; 189 ureq->urb = NULL; 190 191 kfree(ureq); 192 } 193 194 /* 195 * status 196 */ 197 static int usbhsh_is_running(struct usbhsh_hpriv *hpriv) 198 { 199 /* 200 * we can decide some device is attached or not 201 * by checking mod.irq_attch 202 * see 203 * usbhsh_irq_attch() 204 * usbhsh_irq_dtch() 205 */ 206 return (hpriv->mod.irq_attch == NULL); 207 } 208 209 /* 210 * pipe control 211 */ 212 static void usbhsh_endpoint_sequence_save(struct usbhsh_hpriv *hpriv, 213 struct urb *urb, 214 struct usbhs_pkt *pkt) 215 { 216 int len = urb->actual_length; 217 int maxp = usb_endpoint_maxp(&urb->ep->desc); 218 int t = 0; 219 220 /* DCP is out of sequence control */ 221 if (usb_pipecontrol(urb->pipe)) 222 return; 223 224 /* 225 * renesas_usbhs pipe has a limitation in a number. 226 * So, driver should re-use the limited pipe for each device/endpoint. 227 * DATA0/1 sequence should be saved for it. 228 * see [image of mod_host] 229 * [HARDWARE LIMITATION] 230 */ 231 232 /* 233 * next sequence depends on actual_length 234 * 235 * ex) actual_length = 1147, maxp = 512 236 * data0 : 512 237 * data1 : 512 238 * data0 : 123 239 * data1 is the next sequence 240 */ 241 t = len / maxp; 242 if (len % maxp) 243 t++; 244 if (pkt->zero) 245 t++; 246 t %= 2; 247 248 if (t) 249 usb_dotoggle(urb->dev, 250 usb_pipeendpoint(urb->pipe), 251 usb_pipeout(urb->pipe)); 252 } 253 254 static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv, 255 struct urb *urb); 256 257 static int usbhsh_pipe_attach(struct usbhsh_hpriv *hpriv, 258 struct urb *urb) 259 { 260 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 261 struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep); 262 struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb); 263 struct usbhs_pipe *pipe; 264 struct usb_endpoint_descriptor *desc = &urb->ep->desc; 265 struct device *dev = usbhs_priv_to_dev(priv); 266 unsigned long flags; 267 int dir_in_req = !!usb_pipein(urb->pipe); 268 int is_dcp = usb_endpoint_xfer_control(desc); 269 int i, dir_in; 270 int ret = -EBUSY; 271 272 /******************** spin lock ********************/ 273 usbhs_lock(priv, flags); 274 275 /* 276 * if uep has been attached to pipe, 277 * reuse it 278 */ 279 if (usbhsh_uep_to_pipe(uep)) { 280 ret = 0; 281 goto usbhsh_pipe_attach_done; 282 } 283 284 usbhs_for_each_pipe_with_dcp(pipe, priv, i) { 285 286 /* check pipe type */ 287 if (!usbhs_pipe_type_is(pipe, usb_endpoint_type(desc))) 288 continue; 289 290 /* check pipe direction if normal pipe */ 291 if (!is_dcp) { 292 dir_in = !!usbhs_pipe_is_dir_in(pipe); 293 if (0 != (dir_in - dir_in_req)) 294 continue; 295 } 296 297 /* check pipe is free */ 298 if (usbhsh_pipe_to_uep(pipe)) 299 continue; 300 301 /* 302 * attach pipe to uep 303 * 304 * usbhs_pipe_config_update() should be called after 305 * usbhs_set_device_config() 306 * see 307 * DCPMAXP/PIPEMAXP 308 */ 309 usbhsh_uep_to_pipe(uep) = pipe; 310 usbhsh_pipe_to_uep(pipe) = uep; 311 312 usbhs_pipe_config_update(pipe, 313 usbhsh_device_number(hpriv, udev), 314 usb_endpoint_num(desc), 315 usb_endpoint_maxp(desc)); 316 317 dev_dbg(dev, "%s [%d-%d(%s:%s)]\n", __func__, 318 usbhsh_device_number(hpriv, udev), 319 usb_endpoint_num(desc), 320 usbhs_pipe_name(pipe), 321 dir_in_req ? "in" : "out"); 322 323 ret = 0; 324 break; 325 } 326 327 usbhsh_pipe_attach_done: 328 if (0 == ret) 329 uep->counter++; 330 331 usbhs_unlock(priv, flags); 332 /******************** spin unlock ******************/ 333 334 return ret; 335 } 336 337 static void usbhsh_pipe_detach(struct usbhsh_hpriv *hpriv, 338 struct usbhsh_ep *uep) 339 { 340 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 341 struct usbhs_pipe *pipe; 342 struct device *dev = usbhs_priv_to_dev(priv); 343 unsigned long flags; 344 345 if (unlikely(!uep)) { 346 dev_err(dev, "no uep\n"); 347 return; 348 } 349 350 /******************** spin lock ********************/ 351 usbhs_lock(priv, flags); 352 353 pipe = usbhsh_uep_to_pipe(uep); 354 355 if (unlikely(!pipe)) { 356 dev_err(dev, "uep doens't have pipe\n"); 357 } else if (1 == uep->counter--) { /* last user */ 358 struct usb_host_endpoint *ep = usbhsh_uep_to_ep(uep); 359 struct usbhsh_device *udev = usbhsh_uep_to_udev(uep); 360 361 /* detach pipe from uep */ 362 usbhsh_uep_to_pipe(uep) = NULL; 363 usbhsh_pipe_to_uep(pipe) = NULL; 364 365 dev_dbg(dev, "%s [%d-%d(%s)]\n", __func__, 366 usbhsh_device_number(hpriv, udev), 367 usb_endpoint_num(&ep->desc), 368 usbhs_pipe_name(pipe)); 369 } 370 371 usbhs_unlock(priv, flags); 372 /******************** spin unlock ******************/ 373 } 374 375 /* 376 * endpoint control 377 */ 378 static int usbhsh_endpoint_attach(struct usbhsh_hpriv *hpriv, 379 struct urb *urb, 380 gfp_t mem_flags) 381 { 382 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 383 struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb); 384 struct usb_host_endpoint *ep = urb->ep; 385 struct usbhsh_ep *uep; 386 struct device *dev = usbhs_priv_to_dev(priv); 387 struct usb_endpoint_descriptor *desc = &ep->desc; 388 unsigned long flags; 389 390 uep = kzalloc(sizeof(struct usbhsh_ep), mem_flags); 391 if (!uep) { 392 dev_err(dev, "usbhsh_ep alloc fail\n"); 393 return -ENOMEM; 394 } 395 396 /******************** spin lock ********************/ 397 usbhs_lock(priv, flags); 398 399 /* 400 * init endpoint 401 */ 402 uep->counter = 0; 403 INIT_LIST_HEAD(&uep->ep_list); 404 list_add_tail(&uep->ep_list, &udev->ep_list_head); 405 406 usbhsh_uep_to_udev(uep) = udev; 407 usbhsh_uep_to_ep(uep) = ep; 408 usbhsh_ep_to_uep(ep) = uep; 409 410 usbhs_unlock(priv, flags); 411 /******************** spin unlock ******************/ 412 413 dev_dbg(dev, "%s [%d-%d]\n", __func__, 414 usbhsh_device_number(hpriv, udev), 415 usb_endpoint_num(desc)); 416 417 return 0; 418 } 419 420 static void usbhsh_endpoint_detach(struct usbhsh_hpriv *hpriv, 421 struct usb_host_endpoint *ep) 422 { 423 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 424 struct device *dev = usbhs_priv_to_dev(priv); 425 struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep); 426 unsigned long flags; 427 428 if (!uep) 429 return; 430 431 dev_dbg(dev, "%s [%d-%d]\n", __func__, 432 usbhsh_device_number(hpriv, usbhsh_uep_to_udev(uep)), 433 usb_endpoint_num(&ep->desc)); 434 435 if (usbhsh_uep_to_pipe(uep)) 436 usbhsh_pipe_detach(hpriv, uep); 437 438 /******************** spin lock ********************/ 439 usbhs_lock(priv, flags); 440 441 /* remove this endpoint from udev */ 442 list_del_init(&uep->ep_list); 443 444 usbhsh_uep_to_udev(uep) = NULL; 445 usbhsh_uep_to_ep(uep) = NULL; 446 usbhsh_ep_to_uep(ep) = NULL; 447 448 usbhs_unlock(priv, flags); 449 /******************** spin unlock ******************/ 450 451 kfree(uep); 452 } 453 454 static void usbhsh_endpoint_detach_all(struct usbhsh_hpriv *hpriv, 455 struct usbhsh_device *udev) 456 { 457 struct usbhsh_ep *uep, *next; 458 459 list_for_each_entry_safe(uep, next, &udev->ep_list_head, ep_list) 460 usbhsh_endpoint_detach(hpriv, usbhsh_uep_to_ep(uep)); 461 } 462 463 /* 464 * device control 465 */ 466 static int usbhsh_connected_to_rhdev(struct usb_hcd *hcd, 467 struct usbhsh_device *udev) 468 { 469 struct usb_device *usbv = usbhsh_udev_to_usbv(udev); 470 471 return hcd->self.root_hub == usbv->parent; 472 } 473 474 static int usbhsh_device_has_endpoint(struct usbhsh_device *udev) 475 { 476 return !list_empty(&udev->ep_list_head); 477 } 478 479 static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv, 480 struct urb *urb) 481 { 482 struct usb_device *usbv = usbhsh_urb_to_usbv(urb); 483 struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv); 484 485 /* usbhsh_device_attach() is still not called */ 486 if (!udev) 487 return NULL; 488 489 /* if it is device0, return it */ 490 if (0 == usb_pipedevice(urb->pipe)) 491 return usbhsh_device0(hpriv); 492 493 /* return attached device */ 494 return udev; 495 } 496 497 static struct usbhsh_device *usbhsh_device_attach(struct usbhsh_hpriv *hpriv, 498 struct urb *urb) 499 { 500 struct usbhsh_device *udev = NULL; 501 struct usbhsh_device *udev0 = usbhsh_device0(hpriv); 502 struct usbhsh_device *pos; 503 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); 504 struct device *dev = usbhsh_hcd_to_dev(hcd); 505 struct usb_device *usbv = usbhsh_urb_to_usbv(urb); 506 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 507 unsigned long flags; 508 u16 upphub, hubport; 509 int i; 510 511 /* 512 * This function should be called only while urb is pointing to device0. 513 * It will attach unused usbhsh_device to urb (usbv), 514 * and initialize device0. 515 * You can use usbhsh_device_get() to get "current" udev, 516 * and usbhsh_usbv_to_udev() is for "attached" udev. 517 */ 518 if (0 != usb_pipedevice(urb->pipe)) { 519 dev_err(dev, "%s fail: urb isn't pointing device0\n", __func__); 520 return NULL; 521 } 522 523 /******************** spin lock ********************/ 524 usbhs_lock(priv, flags); 525 526 /* 527 * find unused device 528 */ 529 usbhsh_for_each_udev(pos, hpriv, i) { 530 if (usbhsh_udev_is_used(pos)) 531 continue; 532 udev = pos; 533 break; 534 } 535 536 if (udev) { 537 /* 538 * usbhsh_usbv_to_udev() 539 * usbhsh_udev_to_usbv() 540 * will be enable 541 */ 542 dev_set_drvdata(&usbv->dev, udev); 543 udev->usbv = usbv; 544 } 545 546 usbhs_unlock(priv, flags); 547 /******************** spin unlock ******************/ 548 549 if (!udev) { 550 dev_err(dev, "no free usbhsh_device\n"); 551 return NULL; 552 } 553 554 if (usbhsh_device_has_endpoint(udev)) { 555 dev_warn(dev, "udev have old endpoint\n"); 556 usbhsh_endpoint_detach_all(hpriv, udev); 557 } 558 559 if (usbhsh_device_has_endpoint(udev0)) { 560 dev_warn(dev, "udev0 have old endpoint\n"); 561 usbhsh_endpoint_detach_all(hpriv, udev0); 562 } 563 564 /* uep will be attached */ 565 INIT_LIST_HEAD(&udev0->ep_list_head); 566 INIT_LIST_HEAD(&udev->ep_list_head); 567 568 /* 569 * set device0 config 570 */ 571 usbhs_set_device_config(priv, 572 0, 0, 0, usbv->speed); 573 574 /* 575 * set new device config 576 */ 577 upphub = 0; 578 hubport = 0; 579 if (!usbhsh_connected_to_rhdev(hcd, udev)) { 580 /* if udev is not connected to rhdev, it means parent is Hub */ 581 struct usbhsh_device *parent = usbhsh_device_parent(udev); 582 583 upphub = usbhsh_device_number(hpriv, parent); 584 hubport = usbhsh_device_hubport(udev); 585 586 dev_dbg(dev, "%s connecte to Hub [%d:%d](%p)\n", __func__, 587 upphub, hubport, parent); 588 } 589 590 usbhs_set_device_config(priv, 591 usbhsh_device_number(hpriv, udev), 592 upphub, hubport, usbv->speed); 593 594 dev_dbg(dev, "%s [%d](%p)\n", __func__, 595 usbhsh_device_number(hpriv, udev), udev); 596 597 return udev; 598 } 599 600 static void usbhsh_device_detach(struct usbhsh_hpriv *hpriv, 601 struct usbhsh_device *udev) 602 { 603 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); 604 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 605 struct device *dev = usbhsh_hcd_to_dev(hcd); 606 struct usb_device *usbv = usbhsh_udev_to_usbv(udev); 607 unsigned long flags; 608 609 dev_dbg(dev, "%s [%d](%p)\n", __func__, 610 usbhsh_device_number(hpriv, udev), udev); 611 612 if (usbhsh_device_has_endpoint(udev)) { 613 dev_warn(dev, "udev still have endpoint\n"); 614 usbhsh_endpoint_detach_all(hpriv, udev); 615 } 616 617 /* 618 * There is nothing to do if it is device0. 619 * see 620 * usbhsh_device_attach() 621 * usbhsh_device_get() 622 */ 623 if (0 == usbhsh_device_number(hpriv, udev)) 624 return; 625 626 /******************** spin lock ********************/ 627 usbhs_lock(priv, flags); 628 629 /* 630 * usbhsh_usbv_to_udev() 631 * usbhsh_udev_to_usbv() 632 * will be disable 633 */ 634 dev_set_drvdata(&usbv->dev, NULL); 635 udev->usbv = NULL; 636 637 usbhs_unlock(priv, flags); 638 /******************** spin unlock ******************/ 639 } 640 641 /* 642 * queue push/pop 643 */ 644 static void usbhsh_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt) 645 { 646 struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt); 647 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 648 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); 649 struct urb *urb = ureq->urb; 650 struct device *dev = usbhs_priv_to_dev(priv); 651 int status = 0; 652 653 dev_dbg(dev, "%s\n", __func__); 654 655 if (!urb) { 656 dev_warn(dev, "pkt doesn't have urb\n"); 657 return; 658 } 659 660 if (!usbhsh_is_running(hpriv)) 661 status = -ESHUTDOWN; 662 663 urb->actual_length = pkt->actual; 664 665 usbhsh_endpoint_sequence_save(hpriv, urb, pkt); 666 usbhsh_ureq_free(hpriv, ureq); 667 668 usbhsh_pipe_detach(hpriv, usbhsh_ep_to_uep(urb->ep)); 669 670 usb_hcd_unlink_urb_from_ep(hcd, urb); 671 usb_hcd_giveback_urb(hcd, urb, status); 672 } 673 674 static int usbhsh_queue_push(struct usb_hcd *hcd, 675 struct urb *urb, 676 gfp_t mem_flags) 677 { 678 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd); 679 struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep); 680 struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep); 681 struct device *dev = usbhsh_hcd_to_dev(hcd); 682 struct usbhsh_request *ureq; 683 void *buf; 684 int len, sequence; 685 686 if (usb_pipeisoc(urb->pipe)) { 687 dev_err(dev, "pipe iso is not supported now\n"); 688 return -EIO; 689 } 690 691 /* this ureq will be freed on usbhsh_queue_done() */ 692 ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags); 693 if (unlikely(!ureq)) { 694 dev_err(dev, "ureq alloc fail\n"); 695 return -ENOMEM; 696 } 697 698 if (usb_pipein(urb->pipe)) 699 pipe->handler = &usbhs_fifo_dma_pop_handler; 700 else 701 pipe->handler = &usbhs_fifo_dma_push_handler; 702 703 buf = (void *)(urb->transfer_buffer + urb->actual_length); 704 len = urb->transfer_buffer_length - urb->actual_length; 705 706 sequence = usb_gettoggle(urb->dev, 707 usb_pipeendpoint(urb->pipe), 708 usb_pipeout(urb->pipe)); 709 710 dev_dbg(dev, "%s\n", __func__); 711 usbhs_pkt_push(pipe, &ureq->pkt, usbhsh_queue_done, 712 buf, len, (urb->transfer_flags & URB_ZERO_PACKET), 713 sequence); 714 715 usbhs_pkt_start(pipe); 716 717 return 0; 718 } 719 720 static void usbhsh_queue_force_pop(struct usbhs_priv *priv, 721 struct usbhs_pipe *pipe) 722 { 723 struct usbhs_pkt *pkt; 724 725 while (1) { 726 pkt = usbhs_pkt_pop(pipe, NULL); 727 if (!pkt) 728 break; 729 730 /* 731 * if all packet are gone, usbhsh_endpoint_disable() 732 * will be called. 733 * then, attached device/endpoint/pipe will be detached 734 */ 735 usbhsh_queue_done(priv, pkt); 736 } 737 } 738 739 static void usbhsh_queue_force_pop_all(struct usbhs_priv *priv) 740 { 741 struct usbhs_pipe *pos; 742 int i; 743 744 usbhs_for_each_pipe_with_dcp(pos, priv, i) 745 usbhsh_queue_force_pop(priv, pos); 746 } 747 748 /* 749 * DCP setup stage 750 */ 751 static int usbhsh_is_request_address(struct urb *urb) 752 { 753 struct usb_ctrlrequest *req; 754 755 req = (struct usb_ctrlrequest *)urb->setup_packet; 756 757 if ((DeviceOutRequest == req->bRequestType << 8) && 758 (USB_REQ_SET_ADDRESS == req->bRequest)) 759 return 1; 760 else 761 return 0; 762 } 763 764 static void usbhsh_setup_stage_packet_push(struct usbhsh_hpriv *hpriv, 765 struct urb *urb, 766 struct usbhs_pipe *pipe) 767 { 768 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 769 struct usb_ctrlrequest req; 770 struct device *dev = usbhs_priv_to_dev(priv); 771 772 /* 773 * wait setup packet ACK 774 * see 775 * usbhsh_irq_setup_ack() 776 * usbhsh_irq_setup_err() 777 */ 778 init_completion(&hpriv->setup_ack_done); 779 780 /* copy original request */ 781 memcpy(&req, urb->setup_packet, sizeof(struct usb_ctrlrequest)); 782 783 /* 784 * renesas_usbhs can not use original usb address. 785 * see HARDWARE LIMITATION. 786 * modify usb address here to use attached device. 787 * see usbhsh_device_attach() 788 */ 789 if (usbhsh_is_request_address(urb)) { 790 struct usb_device *usbv = usbhsh_urb_to_usbv(urb); 791 struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv); 792 793 /* udev is a attached device */ 794 req.wValue = usbhsh_device_number(hpriv, udev); 795 dev_dbg(dev, "create new address - %d\n", req.wValue); 796 } 797 798 /* set request */ 799 usbhs_usbreq_set_val(priv, &req); 800 801 /* 802 * wait setup packet ACK 803 */ 804 wait_for_completion(&hpriv->setup_ack_done); 805 806 dev_dbg(dev, "%s done\n", __func__); 807 } 808 809 /* 810 * DCP data stage 811 */ 812 static void usbhsh_data_stage_packet_done(struct usbhs_priv *priv, 813 struct usbhs_pkt *pkt) 814 { 815 struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt); 816 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 817 818 /* this ureq was connected to urb when usbhsh_urb_enqueue() */ 819 820 usbhsh_ureq_free(hpriv, ureq); 821 } 822 823 static int usbhsh_data_stage_packet_push(struct usbhsh_hpriv *hpriv, 824 struct urb *urb, 825 struct usbhs_pipe *pipe, 826 gfp_t mem_flags) 827 828 { 829 struct usbhsh_request *ureq; 830 831 /* this ureq will be freed on usbhsh_data_stage_packet_done() */ 832 ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags); 833 if (unlikely(!ureq)) 834 return -ENOMEM; 835 836 if (usb_pipein(urb->pipe)) 837 pipe->handler = &usbhs_dcp_data_stage_in_handler; 838 else 839 pipe->handler = &usbhs_dcp_data_stage_out_handler; 840 841 usbhs_pkt_push(pipe, &ureq->pkt, 842 usbhsh_data_stage_packet_done, 843 urb->transfer_buffer, 844 urb->transfer_buffer_length, 845 (urb->transfer_flags & URB_ZERO_PACKET), 846 -1); 847 848 return 0; 849 } 850 851 /* 852 * DCP status stage 853 */ 854 static int usbhsh_status_stage_packet_push(struct usbhsh_hpriv *hpriv, 855 struct urb *urb, 856 struct usbhs_pipe *pipe, 857 gfp_t mem_flags) 858 { 859 struct usbhsh_request *ureq; 860 861 /* This ureq will be freed on usbhsh_queue_done() */ 862 ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags); 863 if (unlikely(!ureq)) 864 return -ENOMEM; 865 866 if (usb_pipein(urb->pipe)) 867 pipe->handler = &usbhs_dcp_status_stage_in_handler; 868 else 869 pipe->handler = &usbhs_dcp_status_stage_out_handler; 870 871 usbhs_pkt_push(pipe, &ureq->pkt, 872 usbhsh_queue_done, 873 NULL, 874 urb->transfer_buffer_length, 875 0, -1); 876 877 return 0; 878 } 879 880 static int usbhsh_dcp_queue_push(struct usb_hcd *hcd, 881 struct urb *urb, 882 gfp_t mflags) 883 { 884 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd); 885 struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep); 886 struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep); 887 struct device *dev = usbhsh_hcd_to_dev(hcd); 888 int ret; 889 890 dev_dbg(dev, "%s\n", __func__); 891 892 /* 893 * setup stage 894 * 895 * usbhsh_send_setup_stage_packet() wait SACK/SIGN 896 */ 897 usbhsh_setup_stage_packet_push(hpriv, urb, pipe); 898 899 /* 900 * data stage 901 * 902 * It is pushed only when urb has buffer. 903 */ 904 if (urb->transfer_buffer_length) { 905 ret = usbhsh_data_stage_packet_push(hpriv, urb, pipe, mflags); 906 if (ret < 0) { 907 dev_err(dev, "data stage failed\n"); 908 return ret; 909 } 910 } 911 912 /* 913 * status stage 914 */ 915 ret = usbhsh_status_stage_packet_push(hpriv, urb, pipe, mflags); 916 if (ret < 0) { 917 dev_err(dev, "status stage failed\n"); 918 return ret; 919 } 920 921 /* 922 * start pushed packets 923 */ 924 usbhs_pkt_start(pipe); 925 926 return 0; 927 } 928 929 /* 930 * dma map functions 931 */ 932 static int usbhsh_dma_map_ctrl(struct usbhs_pkt *pkt, int map) 933 { 934 if (map) { 935 struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt); 936 struct urb *urb = ureq->urb; 937 938 /* it can not use scatter/gather */ 939 if (urb->num_sgs) 940 return -EINVAL; 941 942 pkt->dma = urb->transfer_dma; 943 if (!pkt->dma) 944 return -EINVAL; 945 } 946 947 return 0; 948 } 949 950 /* 951 * for hc_driver 952 */ 953 static int usbhsh_host_start(struct usb_hcd *hcd) 954 { 955 return 0; 956 } 957 958 static void usbhsh_host_stop(struct usb_hcd *hcd) 959 { 960 } 961 962 static int usbhsh_urb_enqueue(struct usb_hcd *hcd, 963 struct urb *urb, 964 gfp_t mem_flags) 965 { 966 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd); 967 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 968 struct device *dev = usbhs_priv_to_dev(priv); 969 struct usb_host_endpoint *ep = urb->ep; 970 struct usbhsh_device *new_udev = NULL; 971 int is_dir_in = usb_pipein(urb->pipe); 972 int ret; 973 974 dev_dbg(dev, "%s (%s)\n", __func__, is_dir_in ? "in" : "out"); 975 976 if (!usbhsh_is_running(hpriv)) { 977 ret = -EIO; 978 dev_err(dev, "host is not running\n"); 979 goto usbhsh_urb_enqueue_error_not_linked; 980 } 981 982 ret = usb_hcd_link_urb_to_ep(hcd, urb); 983 if (ret) { 984 dev_err(dev, "urb link failed\n"); 985 goto usbhsh_urb_enqueue_error_not_linked; 986 } 987 988 /* 989 * attach udev if needed 990 * see [image of mod_host] 991 */ 992 if (!usbhsh_device_get(hpriv, urb)) { 993 new_udev = usbhsh_device_attach(hpriv, urb); 994 if (!new_udev) { 995 ret = -EIO; 996 dev_err(dev, "device attach failed\n"); 997 goto usbhsh_urb_enqueue_error_not_linked; 998 } 999 } 1000 1001 /* 1002 * attach endpoint if needed 1003 * see [image of mod_host] 1004 */ 1005 if (!usbhsh_ep_to_uep(ep)) { 1006 ret = usbhsh_endpoint_attach(hpriv, urb, mem_flags); 1007 if (ret < 0) { 1008 dev_err(dev, "endpoint attach failed\n"); 1009 goto usbhsh_urb_enqueue_error_free_device; 1010 } 1011 } 1012 1013 /* 1014 * attach pipe to endpoint 1015 * see [image of mod_host] 1016 */ 1017 ret = usbhsh_pipe_attach(hpriv, urb); 1018 if (ret < 0) { 1019 dev_err(dev, "pipe attach failed\n"); 1020 goto usbhsh_urb_enqueue_error_free_endpoint; 1021 } 1022 1023 /* 1024 * push packet 1025 */ 1026 if (usb_pipecontrol(urb->pipe)) 1027 ret = usbhsh_dcp_queue_push(hcd, urb, mem_flags); 1028 else 1029 ret = usbhsh_queue_push(hcd, urb, mem_flags); 1030 1031 return ret; 1032 1033 usbhsh_urb_enqueue_error_free_endpoint: 1034 usbhsh_endpoint_detach(hpriv, ep); 1035 usbhsh_urb_enqueue_error_free_device: 1036 if (new_udev) 1037 usbhsh_device_detach(hpriv, new_udev); 1038 usbhsh_urb_enqueue_error_not_linked: 1039 1040 dev_dbg(dev, "%s error\n", __func__); 1041 1042 return ret; 1043 } 1044 1045 static int usbhsh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) 1046 { 1047 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd); 1048 struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb); 1049 1050 if (ureq) { 1051 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 1052 struct usbhs_pkt *pkt = &ureq->pkt; 1053 1054 usbhs_pkt_pop(pkt->pipe, pkt); 1055 usbhsh_queue_done(priv, pkt); 1056 } 1057 1058 return 0; 1059 } 1060 1061 static void usbhsh_endpoint_disable(struct usb_hcd *hcd, 1062 struct usb_host_endpoint *ep) 1063 { 1064 struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep); 1065 struct usbhsh_device *udev; 1066 struct usbhsh_hpriv *hpriv; 1067 1068 /* 1069 * this function might be called manytimes by same hcd/ep 1070 * in-endpoint == out-endpoint if ep == dcp. 1071 */ 1072 if (!uep) 1073 return; 1074 1075 udev = usbhsh_uep_to_udev(uep); 1076 hpriv = usbhsh_hcd_to_hpriv(hcd); 1077 1078 usbhsh_endpoint_detach(hpriv, ep); 1079 1080 /* 1081 * if there is no endpoint, 1082 * free device 1083 */ 1084 if (!usbhsh_device_has_endpoint(udev)) 1085 usbhsh_device_detach(hpriv, udev); 1086 } 1087 1088 static int usbhsh_hub_status_data(struct usb_hcd *hcd, char *buf) 1089 { 1090 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd); 1091 int roothub_id = 1; /* only 1 root hub */ 1092 1093 /* 1094 * does port stat was changed ? 1095 * check USB_PORT_STAT_C_xxx << 16 1096 */ 1097 if (usbhsh_port_stat_get(hpriv) & 0xFFFF0000) 1098 *buf = (1 << roothub_id); 1099 else 1100 *buf = 0; 1101 1102 return !!(*buf); 1103 } 1104 1105 static int __usbhsh_hub_hub_feature(struct usbhsh_hpriv *hpriv, 1106 u16 typeReq, u16 wValue, 1107 u16 wIndex, char *buf, u16 wLength) 1108 { 1109 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 1110 struct device *dev = usbhs_priv_to_dev(priv); 1111 1112 switch (wValue) { 1113 case C_HUB_OVER_CURRENT: 1114 case C_HUB_LOCAL_POWER: 1115 dev_dbg(dev, "%s :: C_HUB_xx\n", __func__); 1116 return 0; 1117 } 1118 1119 return -EPIPE; 1120 } 1121 1122 static int __usbhsh_hub_port_feature(struct usbhsh_hpriv *hpriv, 1123 u16 typeReq, u16 wValue, 1124 u16 wIndex, char *buf, u16 wLength) 1125 { 1126 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 1127 struct device *dev = usbhs_priv_to_dev(priv); 1128 int enable = (typeReq == SetPortFeature); 1129 int speed, i, timeout = 128; 1130 int roothub_id = 1; /* only 1 root hub */ 1131 1132 /* common error */ 1133 if (wIndex > roothub_id || wLength != 0) 1134 return -EPIPE; 1135 1136 /* check wValue */ 1137 switch (wValue) { 1138 case USB_PORT_FEAT_POWER: 1139 usbhs_vbus_ctrl(priv, enable); 1140 dev_dbg(dev, "%s :: USB_PORT_FEAT_POWER\n", __func__); 1141 break; 1142 1143 case USB_PORT_FEAT_ENABLE: 1144 case USB_PORT_FEAT_SUSPEND: 1145 case USB_PORT_FEAT_C_ENABLE: 1146 case USB_PORT_FEAT_C_SUSPEND: 1147 case USB_PORT_FEAT_C_CONNECTION: 1148 case USB_PORT_FEAT_C_OVER_CURRENT: 1149 case USB_PORT_FEAT_C_RESET: 1150 dev_dbg(dev, "%s :: USB_PORT_FEAT_xxx\n", __func__); 1151 break; 1152 1153 case USB_PORT_FEAT_RESET: 1154 if (!enable) 1155 break; 1156 1157 usbhsh_port_stat_clear(hpriv, 1158 USB_PORT_STAT_HIGH_SPEED | 1159 USB_PORT_STAT_LOW_SPEED); 1160 1161 usbhsh_queue_force_pop_all(priv); 1162 1163 usbhs_bus_send_reset(priv); 1164 msleep(20); 1165 usbhs_bus_send_sof_enable(priv); 1166 1167 for (i = 0; i < timeout ; i++) { 1168 switch (usbhs_bus_get_speed(priv)) { 1169 case USB_SPEED_LOW: 1170 speed = USB_PORT_STAT_LOW_SPEED; 1171 goto got_usb_bus_speed; 1172 case USB_SPEED_HIGH: 1173 speed = USB_PORT_STAT_HIGH_SPEED; 1174 goto got_usb_bus_speed; 1175 case USB_SPEED_FULL: 1176 speed = 0; 1177 goto got_usb_bus_speed; 1178 } 1179 1180 msleep(20); 1181 } 1182 return -EPIPE; 1183 1184 got_usb_bus_speed: 1185 usbhsh_port_stat_set(hpriv, speed); 1186 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_ENABLE); 1187 1188 dev_dbg(dev, "%s :: USB_PORT_FEAT_RESET (speed = %d)\n", 1189 __func__, speed); 1190 1191 /* status change is not needed */ 1192 return 0; 1193 1194 default: 1195 return -EPIPE; 1196 } 1197 1198 /* set/clear status */ 1199 if (enable) 1200 usbhsh_port_stat_set(hpriv, (1 << wValue)); 1201 else 1202 usbhsh_port_stat_clear(hpriv, (1 << wValue)); 1203 1204 return 0; 1205 } 1206 1207 static int __usbhsh_hub_get_status(struct usbhsh_hpriv *hpriv, 1208 u16 typeReq, u16 wValue, 1209 u16 wIndex, char *buf, u16 wLength) 1210 { 1211 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 1212 struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf; 1213 struct device *dev = usbhs_priv_to_dev(priv); 1214 int roothub_id = 1; /* only 1 root hub */ 1215 1216 switch (typeReq) { 1217 case GetHubStatus: 1218 dev_dbg(dev, "%s :: GetHubStatus\n", __func__); 1219 1220 *buf = 0x00; 1221 break; 1222 1223 case GetPortStatus: 1224 if (wIndex != roothub_id) 1225 return -EPIPE; 1226 1227 dev_dbg(dev, "%s :: GetPortStatus\n", __func__); 1228 *(__le32 *)buf = cpu_to_le32(usbhsh_port_stat_get(hpriv)); 1229 break; 1230 1231 case GetHubDescriptor: 1232 desc->bDescriptorType = 0x29; 1233 desc->bHubContrCurrent = 0; 1234 desc->bNbrPorts = roothub_id; 1235 desc->bDescLength = 9; 1236 desc->bPwrOn2PwrGood = 0; 1237 desc->wHubCharacteristics = cpu_to_le16(0x0011); 1238 desc->u.hs.DeviceRemovable[0] = (roothub_id << 1); 1239 desc->u.hs.DeviceRemovable[1] = ~0; 1240 dev_dbg(dev, "%s :: GetHubDescriptor\n", __func__); 1241 break; 1242 } 1243 1244 return 0; 1245 } 1246 1247 static int usbhsh_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, 1248 u16 wIndex, char *buf, u16 wLength) 1249 { 1250 struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd); 1251 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv); 1252 struct device *dev = usbhs_priv_to_dev(priv); 1253 int ret = -EPIPE; 1254 1255 switch (typeReq) { 1256 1257 /* Hub Feature */ 1258 case ClearHubFeature: 1259 case SetHubFeature: 1260 ret = __usbhsh_hub_hub_feature(hpriv, typeReq, 1261 wValue, wIndex, buf, wLength); 1262 break; 1263 1264 /* Port Feature */ 1265 case SetPortFeature: 1266 case ClearPortFeature: 1267 ret = __usbhsh_hub_port_feature(hpriv, typeReq, 1268 wValue, wIndex, buf, wLength); 1269 break; 1270 1271 /* Get status */ 1272 case GetHubStatus: 1273 case GetPortStatus: 1274 case GetHubDescriptor: 1275 ret = __usbhsh_hub_get_status(hpriv, typeReq, 1276 wValue, wIndex, buf, wLength); 1277 break; 1278 } 1279 1280 dev_dbg(dev, "typeReq = %x, ret = %d, port_stat = %x\n", 1281 typeReq, ret, usbhsh_port_stat_get(hpriv)); 1282 1283 return ret; 1284 } 1285 1286 static int usbhsh_bus_nop(struct usb_hcd *hcd) 1287 { 1288 /* nothing to do */ 1289 return 0; 1290 } 1291 1292 static struct hc_driver usbhsh_driver = { 1293 .description = usbhsh_hcd_name, 1294 .hcd_priv_size = sizeof(struct usbhsh_hpriv), 1295 1296 /* 1297 * generic hardware linkage 1298 */ 1299 .flags = HCD_USB2, 1300 1301 .start = usbhsh_host_start, 1302 .stop = usbhsh_host_stop, 1303 1304 /* 1305 * managing i/o requests and associated device resources 1306 */ 1307 .urb_enqueue = usbhsh_urb_enqueue, 1308 .urb_dequeue = usbhsh_urb_dequeue, 1309 .endpoint_disable = usbhsh_endpoint_disable, 1310 1311 /* 1312 * root hub 1313 */ 1314 .hub_status_data = usbhsh_hub_status_data, 1315 .hub_control = usbhsh_hub_control, 1316 .bus_suspend = usbhsh_bus_nop, 1317 .bus_resume = usbhsh_bus_nop, 1318 }; 1319 1320 /* 1321 * interrupt functions 1322 */ 1323 static int usbhsh_irq_attch(struct usbhs_priv *priv, 1324 struct usbhs_irq_state *irq_state) 1325 { 1326 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 1327 struct device *dev = usbhs_priv_to_dev(priv); 1328 1329 dev_dbg(dev, "device attached\n"); 1330 1331 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_CONNECTION); 1332 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16); 1333 1334 /* 1335 * attch interrupt might happen infinitely on some device 1336 * (on self power USB hub ?) 1337 * disable it here. 1338 * 1339 * usbhsh_is_running() becomes effective 1340 * according to this process. 1341 * see 1342 * usbhsh_is_running() 1343 * usbhsh_urb_enqueue() 1344 */ 1345 hpriv->mod.irq_attch = NULL; 1346 usbhs_irq_callback_update(priv, &hpriv->mod); 1347 1348 return 0; 1349 } 1350 1351 static int usbhsh_irq_dtch(struct usbhs_priv *priv, 1352 struct usbhs_irq_state *irq_state) 1353 { 1354 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 1355 struct device *dev = usbhs_priv_to_dev(priv); 1356 1357 dev_dbg(dev, "device detached\n"); 1358 1359 usbhsh_port_stat_clear(hpriv, USB_PORT_STAT_CONNECTION); 1360 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16); 1361 1362 /* 1363 * enable attch interrupt again 1364 * 1365 * usbhsh_is_running() becomes invalid 1366 * according to this process. 1367 * see 1368 * usbhsh_is_running() 1369 * usbhsh_urb_enqueue() 1370 */ 1371 hpriv->mod.irq_attch = usbhsh_irq_attch; 1372 usbhs_irq_callback_update(priv, &hpriv->mod); 1373 1374 /* 1375 * usbhsh_queue_force_pop_all() should be called 1376 * after usbhsh_is_running() becomes invalid. 1377 */ 1378 usbhsh_queue_force_pop_all(priv); 1379 1380 return 0; 1381 } 1382 1383 static int usbhsh_irq_setup_ack(struct usbhs_priv *priv, 1384 struct usbhs_irq_state *irq_state) 1385 { 1386 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 1387 struct device *dev = usbhs_priv_to_dev(priv); 1388 1389 dev_dbg(dev, "setup packet OK\n"); 1390 1391 complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */ 1392 1393 return 0; 1394 } 1395 1396 static int usbhsh_irq_setup_err(struct usbhs_priv *priv, 1397 struct usbhs_irq_state *irq_state) 1398 { 1399 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 1400 struct device *dev = usbhs_priv_to_dev(priv); 1401 1402 dev_dbg(dev, "setup packet Err\n"); 1403 1404 complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */ 1405 1406 return 0; 1407 } 1408 1409 /* 1410 * module start/stop 1411 */ 1412 static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv) 1413 { 1414 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 1415 struct usbhs_pipe *pipe; 1416 u32 *pipe_type = usbhs_get_dparam(priv, pipe_type); 1417 int pipe_size = usbhs_get_dparam(priv, pipe_size); 1418 int old_type, dir_in, i; 1419 1420 /* init all pipe */ 1421 old_type = USB_ENDPOINT_XFER_CONTROL; 1422 for (i = 0; i < pipe_size; i++) { 1423 1424 /* 1425 * data "output" will be finished as soon as possible, 1426 * but there is no guaranty at data "input" case. 1427 * 1428 * "input" needs "standby" pipe. 1429 * So, "input" direction pipe > "output" direction pipe 1430 * is good idea. 1431 * 1432 * 1st USB_ENDPOINT_XFER_xxx will be output direction, 1433 * and the other will be input direction here. 1434 * 1435 * ex) 1436 * ... 1437 * USB_ENDPOINT_XFER_ISOC -> dir out 1438 * USB_ENDPOINT_XFER_ISOC -> dir in 1439 * USB_ENDPOINT_XFER_BULK -> dir out 1440 * USB_ENDPOINT_XFER_BULK -> dir in 1441 * USB_ENDPOINT_XFER_BULK -> dir in 1442 * ... 1443 */ 1444 dir_in = (pipe_type[i] == old_type); 1445 old_type = pipe_type[i]; 1446 1447 if (USB_ENDPOINT_XFER_CONTROL == pipe_type[i]) { 1448 pipe = usbhs_dcp_malloc(priv); 1449 usbhsh_hpriv_to_dcp(hpriv) = pipe; 1450 } else { 1451 pipe = usbhs_pipe_malloc(priv, 1452 pipe_type[i], 1453 dir_in); 1454 } 1455 1456 pipe->mod_private = NULL; 1457 } 1458 } 1459 1460 static int usbhsh_start(struct usbhs_priv *priv) 1461 { 1462 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 1463 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); 1464 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 1465 struct device *dev = usbhs_priv_to_dev(priv); 1466 int ret; 1467 1468 /* add hcd */ 1469 ret = usb_add_hcd(hcd, 0, 0); 1470 if (ret < 0) 1471 return 0; 1472 device_wakeup_enable(hcd->self.controller); 1473 1474 /* 1475 * pipe initialize and enable DCP 1476 */ 1477 usbhs_pipe_init(priv, 1478 usbhsh_dma_map_ctrl); 1479 usbhs_fifo_init(priv); 1480 usbhsh_pipe_init_for_host(priv); 1481 1482 /* 1483 * system config enble 1484 * - HI speed 1485 * - host 1486 * - usb module 1487 */ 1488 usbhs_sys_host_ctrl(priv, 1); 1489 1490 /* 1491 * enable irq callback 1492 */ 1493 mod->irq_attch = usbhsh_irq_attch; 1494 mod->irq_dtch = usbhsh_irq_dtch; 1495 mod->irq_sack = usbhsh_irq_setup_ack; 1496 mod->irq_sign = usbhsh_irq_setup_err; 1497 usbhs_irq_callback_update(priv, mod); 1498 1499 dev_dbg(dev, "start host\n"); 1500 1501 return ret; 1502 } 1503 1504 static int usbhsh_stop(struct usbhs_priv *priv) 1505 { 1506 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 1507 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); 1508 struct usbhs_mod *mod = usbhs_mod_get_current(priv); 1509 struct device *dev = usbhs_priv_to_dev(priv); 1510 1511 /* 1512 * disable irq callback 1513 */ 1514 mod->irq_attch = NULL; 1515 mod->irq_dtch = NULL; 1516 mod->irq_sack = NULL; 1517 mod->irq_sign = NULL; 1518 usbhs_irq_callback_update(priv, mod); 1519 1520 usb_remove_hcd(hcd); 1521 1522 /* disable sys */ 1523 usbhs_sys_host_ctrl(priv, 0); 1524 1525 dev_dbg(dev, "quit host\n"); 1526 1527 return 0; 1528 } 1529 1530 int usbhs_mod_host_probe(struct usbhs_priv *priv) 1531 { 1532 struct usbhsh_hpriv *hpriv; 1533 struct usb_hcd *hcd; 1534 struct usbhsh_device *udev; 1535 struct device *dev = usbhs_priv_to_dev(priv); 1536 int i; 1537 1538 /* initialize hcd */ 1539 hcd = usb_create_hcd(&usbhsh_driver, dev, usbhsh_hcd_name); 1540 if (!hcd) { 1541 dev_err(dev, "Failed to create hcd\n"); 1542 return -ENOMEM; 1543 } 1544 hcd->has_tt = 1; /* for low/full speed */ 1545 1546 /* 1547 * CAUTION 1548 * 1549 * There is no guarantee that it is possible to access usb module here. 1550 * Don't accesses to it. 1551 * The accesse will be enable after "usbhsh_start" 1552 */ 1553 1554 hpriv = usbhsh_hcd_to_hpriv(hcd); 1555 1556 /* 1557 * register itself 1558 */ 1559 usbhs_mod_register(priv, &hpriv->mod, USBHS_HOST); 1560 1561 /* init hpriv */ 1562 hpriv->mod.name = "host"; 1563 hpriv->mod.start = usbhsh_start; 1564 hpriv->mod.stop = usbhsh_stop; 1565 usbhsh_port_stat_init(hpriv); 1566 1567 /* init all device */ 1568 usbhsh_for_each_udev_with_dev0(udev, hpriv, i) { 1569 udev->usbv = NULL; 1570 INIT_LIST_HEAD(&udev->ep_list_head); 1571 } 1572 1573 dev_info(dev, "host probed\n"); 1574 1575 return 0; 1576 } 1577 1578 int usbhs_mod_host_remove(struct usbhs_priv *priv) 1579 { 1580 struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv); 1581 struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv); 1582 1583 usb_put_hcd(hcd); 1584 1585 return 0; 1586 } 1587