1 /* 2 * Enhanced Host Controller Interface (EHCI) driver for USB. 3 * 4 * Maintainer: Alan Stern <stern@rowland.harvard.edu> 5 * 6 * Copyright (c) 2000-2004 by David Brownell 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the 10 * Free Software Foundation; either version 2 of the License, or (at your 11 * option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, but 14 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 15 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 16 * for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software Foundation, 20 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21 */ 22 23 #include <linux/module.h> 24 #include <linux/pci.h> 25 #include <linux/dmapool.h> 26 #include <linux/kernel.h> 27 #include <linux/delay.h> 28 #include <linux/ioport.h> 29 #include <linux/sched.h> 30 #include <linux/vmalloc.h> 31 #include <linux/errno.h> 32 #include <linux/init.h> 33 #include <linux/timer.h> 34 #include <linux/ktime.h> 35 #include <linux/list.h> 36 #include <linux/interrupt.h> 37 #include <linux/usb.h> 38 #include <linux/usb/hcd.h> 39 #include <linux/moduleparam.h> 40 #include <linux/dma-mapping.h> 41 #include <linux/debugfs.h> 42 #include <linux/slab.h> 43 #include <linux/uaccess.h> 44 45 #include <asm/byteorder.h> 46 #include <asm/io.h> 47 #include <asm/irq.h> 48 #include <asm/unaligned.h> 49 50 #if defined(CONFIG_PPC_PS3) 51 #include <asm/firmware.h> 52 #endif 53 54 /*-------------------------------------------------------------------------*/ 55 56 /* 57 * EHCI hc_driver implementation ... experimental, incomplete. 58 * Based on the final 1.0 register interface specification. 59 * 60 * USB 2.0 shows up in upcoming www.pcmcia.org technology. 61 * First was PCMCIA, like ISA; then CardBus, which is PCI. 62 * Next comes "CardBay", using USB 2.0 signals. 63 * 64 * Contains additional contributions by Brad Hards, Rory Bolt, and others. 65 * Special thanks to Intel and VIA for providing host controllers to 66 * test this driver on, and Cypress (including In-System Design) for 67 * providing early devices for those host controllers to talk to! 68 */ 69 70 #define DRIVER_AUTHOR "David Brownell" 71 #define DRIVER_DESC "USB 2.0 'Enhanced' Host Controller (EHCI) Driver" 72 73 static const char hcd_name [] = "ehci_hcd"; 74 75 76 #undef VERBOSE_DEBUG 77 #undef EHCI_URB_TRACE 78 79 #ifdef DEBUG 80 #define EHCI_STATS 81 #endif 82 83 /* magic numbers that can affect system performance */ 84 #define EHCI_TUNE_CERR 3 /* 0-3 qtd retries; 0 == don't stop */ 85 #define EHCI_TUNE_RL_HS 4 /* nak throttle; see 4.9 */ 86 #define EHCI_TUNE_RL_TT 0 87 #define EHCI_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */ 88 #define EHCI_TUNE_MULT_TT 1 89 /* 90 * Some drivers think it's safe to schedule isochronous transfers more than 91 * 256 ms into the future (partly as a result of an old bug in the scheduling 92 * code). In an attempt to avoid trouble, we will use a minimum scheduling 93 * length of 512 frames instead of 256. 94 */ 95 #define EHCI_TUNE_FLS 1 /* (medium) 512-frame schedule */ 96 97 #define EHCI_IAA_MSECS 10 /* arbitrary */ 98 #define EHCI_IO_JIFFIES (HZ/10) /* io watchdog > irq_thresh */ 99 #define EHCI_ASYNC_JIFFIES (HZ/20) /* async idle timeout */ 100 #define EHCI_SHRINK_JIFFIES (DIV_ROUND_UP(HZ, 200) + 1) 101 /* 5-ms async qh unlink delay */ 102 103 /* Initial IRQ latency: faster than hw default */ 104 static int log2_irq_thresh = 0; // 0 to 6 105 module_param (log2_irq_thresh, int, S_IRUGO); 106 MODULE_PARM_DESC (log2_irq_thresh, "log2 IRQ latency, 1-64 microframes"); 107 108 /* initial park setting: slower than hw default */ 109 static unsigned park = 0; 110 module_param (park, uint, S_IRUGO); 111 MODULE_PARM_DESC (park, "park setting; 1-3 back-to-back async packets"); 112 113 /* for flakey hardware, ignore overcurrent indicators */ 114 static bool ignore_oc = 0; 115 module_param (ignore_oc, bool, S_IRUGO); 116 MODULE_PARM_DESC (ignore_oc, "ignore bogus hardware overcurrent indications"); 117 118 /* for link power management(LPM) feature */ 119 static unsigned int hird; 120 module_param(hird, int, S_IRUGO); 121 MODULE_PARM_DESC(hird, "host initiated resume duration, +1 for each 75us"); 122 123 #define INTR_MASK (STS_IAA | STS_FATAL | STS_PCD | STS_ERR | STS_INT) 124 125 /*-------------------------------------------------------------------------*/ 126 127 #include "ehci.h" 128 #include "ehci-dbg.c" 129 #include "pci-quirks.h" 130 131 /*-------------------------------------------------------------------------*/ 132 133 static void 134 timer_action(struct ehci_hcd *ehci, enum ehci_timer_action action) 135 { 136 /* Don't override timeouts which shrink or (later) disable 137 * the async ring; just the I/O watchdog. Note that if a 138 * SHRINK were pending, OFF would never be requested. 139 */ 140 if (timer_pending(&ehci->watchdog) 141 && ((BIT(TIMER_ASYNC_SHRINK) | BIT(TIMER_ASYNC_OFF)) 142 & ehci->actions)) 143 return; 144 145 if (!test_and_set_bit(action, &ehci->actions)) { 146 unsigned long t; 147 148 switch (action) { 149 case TIMER_IO_WATCHDOG: 150 if (!ehci->need_io_watchdog) 151 return; 152 t = EHCI_IO_JIFFIES; 153 break; 154 case TIMER_ASYNC_OFF: 155 t = EHCI_ASYNC_JIFFIES; 156 break; 157 /* case TIMER_ASYNC_SHRINK: */ 158 default: 159 t = EHCI_SHRINK_JIFFIES; 160 break; 161 } 162 mod_timer(&ehci->watchdog, t + jiffies); 163 } 164 } 165 166 /*-------------------------------------------------------------------------*/ 167 168 /* 169 * handshake - spin reading hc until handshake completes or fails 170 * @ptr: address of hc register to be read 171 * @mask: bits to look at in result of read 172 * @done: value of those bits when handshake succeeds 173 * @usec: timeout in microseconds 174 * 175 * Returns negative errno, or zero on success 176 * 177 * Success happens when the "mask" bits have the specified value (hardware 178 * handshake done). There are two failure modes: "usec" have passed (major 179 * hardware flakeout), or the register reads as all-ones (hardware removed). 180 * 181 * That last failure should_only happen in cases like physical cardbus eject 182 * before driver shutdown. But it also seems to be caused by bugs in cardbus 183 * bridge shutdown: shutting down the bridge before the devices using it. 184 */ 185 static int handshake (struct ehci_hcd *ehci, void __iomem *ptr, 186 u32 mask, u32 done, int usec) 187 { 188 u32 result; 189 190 do { 191 result = ehci_readl(ehci, ptr); 192 if (result == ~(u32)0) /* card removed */ 193 return -ENODEV; 194 result &= mask; 195 if (result == done) 196 return 0; 197 udelay (1); 198 usec--; 199 } while (usec > 0); 200 return -ETIMEDOUT; 201 } 202 203 /* check TDI/ARC silicon is in host mode */ 204 static int tdi_in_host_mode (struct ehci_hcd *ehci) 205 { 206 u32 __iomem *reg_ptr; 207 u32 tmp; 208 209 reg_ptr = (u32 __iomem *)(((u8 __iomem *)ehci->regs) + USBMODE); 210 tmp = ehci_readl(ehci, reg_ptr); 211 return (tmp & 3) == USBMODE_CM_HC; 212 } 213 214 /* force HC to halt state from unknown (EHCI spec section 2.3) */ 215 static int ehci_halt (struct ehci_hcd *ehci) 216 { 217 u32 temp = ehci_readl(ehci, &ehci->regs->status); 218 219 /* disable any irqs left enabled by previous code */ 220 ehci_writel(ehci, 0, &ehci->regs->intr_enable); 221 222 if (ehci_is_TDI(ehci) && tdi_in_host_mode(ehci) == 0) { 223 return 0; 224 } 225 226 if ((temp & STS_HALT) != 0) 227 return 0; 228 229 /* 230 * This routine gets called during probe before ehci->command 231 * has been initialized, so we can't rely on its value. 232 */ 233 ehci->command &= ~CMD_RUN; 234 temp = ehci_readl(ehci, &ehci->regs->command); 235 temp &= ~(CMD_RUN | CMD_IAAD); 236 ehci_writel(ehci, temp, &ehci->regs->command); 237 return handshake (ehci, &ehci->regs->status, 238 STS_HALT, STS_HALT, 16 * 125); 239 } 240 241 #if defined(CONFIG_USB_SUSPEND) && defined(CONFIG_PPC_PS3) 242 243 /* 244 * The EHCI controller of the Cell Super Companion Chip used in the 245 * PS3 will stop the root hub after all root hub ports are suspended. 246 * When in this condition handshake will return -ETIMEDOUT. The 247 * STS_HLT bit will not be set, so inspection of the frame index is 248 * used here to test for the condition. If the condition is found 249 * return success to allow the USB suspend to complete. 250 */ 251 252 static int handshake_for_broken_root_hub(struct ehci_hcd *ehci, 253 void __iomem *ptr, u32 mask, u32 done, 254 int usec) 255 { 256 unsigned int old_index; 257 int error; 258 259 if (!firmware_has_feature(FW_FEATURE_PS3_LV1)) 260 return -ETIMEDOUT; 261 262 old_index = ehci_read_frame_index(ehci); 263 264 error = handshake(ehci, ptr, mask, done, usec); 265 266 if (error == -ETIMEDOUT && ehci_read_frame_index(ehci) == old_index) 267 return 0; 268 269 return error; 270 } 271 272 #else 273 274 static int handshake_for_broken_root_hub(struct ehci_hcd *ehci, 275 void __iomem *ptr, u32 mask, u32 done, 276 int usec) 277 { 278 return -ETIMEDOUT; 279 } 280 281 #endif 282 283 static int handshake_on_error_set_halt(struct ehci_hcd *ehci, void __iomem *ptr, 284 u32 mask, u32 done, int usec) 285 { 286 int error; 287 288 error = handshake(ehci, ptr, mask, done, usec); 289 if (error == -ETIMEDOUT) 290 error = handshake_for_broken_root_hub(ehci, ptr, mask, done, 291 usec); 292 293 if (error) { 294 ehci_halt(ehci); 295 ehci->rh_state = EHCI_RH_HALTED; 296 ehci_err(ehci, "force halt; handshake %p %08x %08x -> %d\n", 297 ptr, mask, done, error); 298 } 299 300 return error; 301 } 302 303 /* put TDI/ARC silicon into EHCI mode */ 304 static void tdi_reset (struct ehci_hcd *ehci) 305 { 306 u32 __iomem *reg_ptr; 307 u32 tmp; 308 309 reg_ptr = (u32 __iomem *)(((u8 __iomem *)ehci->regs) + USBMODE); 310 tmp = ehci_readl(ehci, reg_ptr); 311 tmp |= USBMODE_CM_HC; 312 /* The default byte access to MMR space is LE after 313 * controller reset. Set the required endian mode 314 * for transfer buffers to match the host microprocessor 315 */ 316 if (ehci_big_endian_mmio(ehci)) 317 tmp |= USBMODE_BE; 318 ehci_writel(ehci, tmp, reg_ptr); 319 } 320 321 /* reset a non-running (STS_HALT == 1) controller */ 322 static int ehci_reset (struct ehci_hcd *ehci) 323 { 324 int retval; 325 u32 command = ehci_readl(ehci, &ehci->regs->command); 326 327 /* If the EHCI debug controller is active, special care must be 328 * taken before and after a host controller reset */ 329 if (ehci->debug && !dbgp_reset_prep()) 330 ehci->debug = NULL; 331 332 command |= CMD_RESET; 333 dbg_cmd (ehci, "reset", command); 334 ehci_writel(ehci, command, &ehci->regs->command); 335 ehci->rh_state = EHCI_RH_HALTED; 336 ehci->next_statechange = jiffies; 337 retval = handshake (ehci, &ehci->regs->command, 338 CMD_RESET, 0, 250 * 1000); 339 340 if (ehci->has_hostpc) { 341 ehci_writel(ehci, USBMODE_EX_HC | USBMODE_EX_VBPS, 342 (u32 __iomem *)(((u8 *)ehci->regs) + USBMODE_EX)); 343 ehci_writel(ehci, TXFIFO_DEFAULT, 344 (u32 __iomem *)(((u8 *)ehci->regs) + TXFILLTUNING)); 345 } 346 if (retval) 347 return retval; 348 349 if (ehci_is_TDI(ehci)) 350 tdi_reset (ehci); 351 352 if (ehci->debug) 353 dbgp_external_startup(); 354 355 ehci->port_c_suspend = ehci->suspended_ports = 356 ehci->resuming_ports = 0; 357 return retval; 358 } 359 360 /* idle the controller (from running) */ 361 static void ehci_quiesce (struct ehci_hcd *ehci) 362 { 363 u32 temp; 364 365 #ifdef DEBUG 366 if (ehci->rh_state != EHCI_RH_RUNNING) 367 BUG (); 368 #endif 369 370 /* wait for any schedule enables/disables to take effect */ 371 temp = (ehci->command << 10) & (STS_ASS | STS_PSS); 372 if (handshake_on_error_set_halt(ehci, &ehci->regs->status, 373 STS_ASS | STS_PSS, temp, 16 * 125)) 374 return; 375 376 /* then disable anything that's still active */ 377 ehci->command &= ~(CMD_ASE | CMD_PSE); 378 ehci_writel(ehci, ehci->command, &ehci->regs->command); 379 380 /* hardware can take 16 microframes to turn off ... */ 381 handshake_on_error_set_halt(ehci, &ehci->regs->status, 382 STS_ASS | STS_PSS, 0, 16 * 125); 383 } 384 385 /*-------------------------------------------------------------------------*/ 386 387 static void end_unlink_async(struct ehci_hcd *ehci); 388 static void ehci_work(struct ehci_hcd *ehci); 389 390 #include "ehci-hub.c" 391 #include "ehci-lpm.c" 392 #include "ehci-mem.c" 393 #include "ehci-q.c" 394 #include "ehci-sched.c" 395 #include "ehci-sysfs.c" 396 397 /*-------------------------------------------------------------------------*/ 398 399 static void ehci_iaa_watchdog(unsigned long param) 400 { 401 struct ehci_hcd *ehci = (struct ehci_hcd *) param; 402 unsigned long flags; 403 404 spin_lock_irqsave (&ehci->lock, flags); 405 406 /* Lost IAA irqs wedge things badly; seen first with a vt8235. 407 * So we need this watchdog, but must protect it against both 408 * (a) SMP races against real IAA firing and retriggering, and 409 * (b) clean HC shutdown, when IAA watchdog was pending. 410 */ 411 if (ehci->reclaim 412 && !timer_pending(&ehci->iaa_watchdog) 413 && ehci->rh_state == EHCI_RH_RUNNING) { 414 u32 cmd, status; 415 416 /* If we get here, IAA is *REALLY* late. It's barely 417 * conceivable that the system is so busy that CMD_IAAD 418 * is still legitimately set, so let's be sure it's 419 * clear before we read STS_IAA. (The HC should clear 420 * CMD_IAAD when it sets STS_IAA.) 421 */ 422 cmd = ehci_readl(ehci, &ehci->regs->command); 423 424 /* If IAA is set here it either legitimately triggered 425 * before we cleared IAAD above (but _way_ late, so we'll 426 * still count it as lost) ... or a silicon erratum: 427 * - VIA seems to set IAA without triggering the IRQ; 428 * - IAAD potentially cleared without setting IAA. 429 */ 430 status = ehci_readl(ehci, &ehci->regs->status); 431 if ((status & STS_IAA) || !(cmd & CMD_IAAD)) { 432 COUNT (ehci->stats.lost_iaa); 433 ehci_writel(ehci, STS_IAA, &ehci->regs->status); 434 } 435 436 ehci_vdbg(ehci, "IAA watchdog: status %x cmd %x\n", 437 status, cmd); 438 end_unlink_async(ehci); 439 } 440 441 spin_unlock_irqrestore(&ehci->lock, flags); 442 } 443 444 static void ehci_watchdog(unsigned long param) 445 { 446 struct ehci_hcd *ehci = (struct ehci_hcd *) param; 447 unsigned long flags; 448 449 spin_lock_irqsave(&ehci->lock, flags); 450 451 /* stop async processing after it's idled a bit */ 452 if (test_bit (TIMER_ASYNC_OFF, &ehci->actions)) 453 start_unlink_async (ehci, ehci->async); 454 455 /* ehci could run by timer, without IRQs ... */ 456 ehci_work (ehci); 457 458 spin_unlock_irqrestore (&ehci->lock, flags); 459 } 460 461 /* On some systems, leaving remote wakeup enabled prevents system shutdown. 462 * The firmware seems to think that powering off is a wakeup event! 463 * This routine turns off remote wakeup and everything else, on all ports. 464 */ 465 static void ehci_turn_off_all_ports(struct ehci_hcd *ehci) 466 { 467 int port = HCS_N_PORTS(ehci->hcs_params); 468 469 while (port--) 470 ehci_writel(ehci, PORT_RWC_BITS, 471 &ehci->regs->port_status[port]); 472 } 473 474 /* 475 * Halt HC, turn off all ports, and let the BIOS use the companion controllers. 476 * Should be called with ehci->lock held. 477 */ 478 static void ehci_silence_controller(struct ehci_hcd *ehci) 479 { 480 ehci_halt(ehci); 481 ehci_turn_off_all_ports(ehci); 482 483 /* make BIOS/etc use companion controller during reboot */ 484 ehci_writel(ehci, 0, &ehci->regs->configured_flag); 485 486 /* unblock posted writes */ 487 ehci_readl(ehci, &ehci->regs->configured_flag); 488 } 489 490 /* ehci_shutdown kick in for silicon on any bus (not just pci, etc). 491 * This forcibly disables dma and IRQs, helping kexec and other cases 492 * where the next system software may expect clean state. 493 */ 494 static void ehci_shutdown(struct usb_hcd *hcd) 495 { 496 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 497 498 del_timer_sync(&ehci->watchdog); 499 del_timer_sync(&ehci->iaa_watchdog); 500 501 spin_lock_irq(&ehci->lock); 502 ehci_silence_controller(ehci); 503 spin_unlock_irq(&ehci->lock); 504 } 505 506 static void ehci_port_power (struct ehci_hcd *ehci, int is_on) 507 { 508 unsigned port; 509 510 if (!HCS_PPC (ehci->hcs_params)) 511 return; 512 513 ehci_dbg (ehci, "...power%s ports...\n", is_on ? "up" : "down"); 514 for (port = HCS_N_PORTS (ehci->hcs_params); port > 0; ) 515 (void) ehci_hub_control(ehci_to_hcd(ehci), 516 is_on ? SetPortFeature : ClearPortFeature, 517 USB_PORT_FEAT_POWER, 518 port--, NULL, 0); 519 /* Flush those writes */ 520 ehci_readl(ehci, &ehci->regs->command); 521 msleep(20); 522 } 523 524 /*-------------------------------------------------------------------------*/ 525 526 /* 527 * ehci_work is called from some interrupts, timers, and so on. 528 * it calls driver completion functions, after dropping ehci->lock. 529 */ 530 static void ehci_work (struct ehci_hcd *ehci) 531 { 532 timer_action_done (ehci, TIMER_IO_WATCHDOG); 533 534 /* another CPU may drop ehci->lock during a schedule scan while 535 * it reports urb completions. this flag guards against bogus 536 * attempts at re-entrant schedule scanning. 537 */ 538 if (ehci->scanning) 539 return; 540 ehci->scanning = 1; 541 scan_async (ehci); 542 if (ehci->next_uframe != -1) 543 scan_periodic (ehci); 544 ehci->scanning = 0; 545 546 /* the IO watchdog guards against hardware or driver bugs that 547 * misplace IRQs, and should let us run completely without IRQs. 548 * such lossage has been observed on both VT6202 and VT8235. 549 */ 550 if (ehci->rh_state == EHCI_RH_RUNNING && 551 (ehci->async->qh_next.ptr != NULL || 552 ehci->periodic_sched != 0)) 553 timer_action (ehci, TIMER_IO_WATCHDOG); 554 } 555 556 /* 557 * Called when the ehci_hcd module is removed. 558 */ 559 static void ehci_stop (struct usb_hcd *hcd) 560 { 561 struct ehci_hcd *ehci = hcd_to_ehci (hcd); 562 563 ehci_dbg (ehci, "stop\n"); 564 565 /* no more interrupts ... */ 566 del_timer_sync (&ehci->watchdog); 567 del_timer_sync(&ehci->iaa_watchdog); 568 569 spin_lock_irq(&ehci->lock); 570 if (ehci->rh_state == EHCI_RH_RUNNING) 571 ehci_quiesce (ehci); 572 573 ehci_silence_controller(ehci); 574 ehci_reset (ehci); 575 spin_unlock_irq(&ehci->lock); 576 577 remove_sysfs_files(ehci); 578 remove_debug_files (ehci); 579 580 /* root hub is shut down separately (first, when possible) */ 581 spin_lock_irq (&ehci->lock); 582 if (ehci->async) 583 ehci_work (ehci); 584 spin_unlock_irq (&ehci->lock); 585 ehci_mem_cleanup (ehci); 586 587 if (ehci->amd_pll_fix == 1) 588 usb_amd_dev_put(); 589 590 #ifdef EHCI_STATS 591 ehci_dbg (ehci, "irq normal %ld err %ld reclaim %ld (lost %ld)\n", 592 ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim, 593 ehci->stats.lost_iaa); 594 ehci_dbg (ehci, "complete %ld unlink %ld\n", 595 ehci->stats.complete, ehci->stats.unlink); 596 #endif 597 598 dbg_status (ehci, "ehci_stop completed", 599 ehci_readl(ehci, &ehci->regs->status)); 600 } 601 602 /* one-time init, only for memory state */ 603 static int ehci_init(struct usb_hcd *hcd) 604 { 605 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 606 u32 temp; 607 int retval; 608 u32 hcc_params; 609 struct ehci_qh_hw *hw; 610 611 spin_lock_init(&ehci->lock); 612 613 /* 614 * keep io watchdog by default, those good HCDs could turn off it later 615 */ 616 ehci->need_io_watchdog = 1; 617 init_timer(&ehci->watchdog); 618 ehci->watchdog.function = ehci_watchdog; 619 ehci->watchdog.data = (unsigned long) ehci; 620 621 init_timer(&ehci->iaa_watchdog); 622 ehci->iaa_watchdog.function = ehci_iaa_watchdog; 623 ehci->iaa_watchdog.data = (unsigned long) ehci; 624 625 hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params); 626 627 /* 628 * by default set standard 80% (== 100 usec/uframe) max periodic 629 * bandwidth as required by USB 2.0 630 */ 631 ehci->uframe_periodic_max = 100; 632 633 /* 634 * hw default: 1K periodic list heads, one per frame. 635 * periodic_size can shrink by USBCMD update if hcc_params allows. 636 */ 637 ehci->periodic_size = DEFAULT_I_TDPS; 638 INIT_LIST_HEAD(&ehci->cached_itd_list); 639 INIT_LIST_HEAD(&ehci->cached_sitd_list); 640 641 if (HCC_PGM_FRAMELISTLEN(hcc_params)) { 642 /* periodic schedule size can be smaller than default */ 643 switch (EHCI_TUNE_FLS) { 644 case 0: ehci->periodic_size = 1024; break; 645 case 1: ehci->periodic_size = 512; break; 646 case 2: ehci->periodic_size = 256; break; 647 default: BUG(); 648 } 649 } 650 if ((retval = ehci_mem_init(ehci, GFP_KERNEL)) < 0) 651 return retval; 652 653 /* controllers may cache some of the periodic schedule ... */ 654 if (HCC_ISOC_CACHE(hcc_params)) // full frame cache 655 ehci->i_thresh = 2 + 8; 656 else // N microframes cached 657 ehci->i_thresh = 2 + HCC_ISOC_THRES(hcc_params); 658 659 ehci->reclaim = NULL; 660 ehci->next_uframe = -1; 661 ehci->clock_frame = -1; 662 663 /* 664 * dedicate a qh for the async ring head, since we couldn't unlink 665 * a 'real' qh without stopping the async schedule [4.8]. use it 666 * as the 'reclamation list head' too. 667 * its dummy is used in hw_alt_next of many tds, to prevent the qh 668 * from automatically advancing to the next td after short reads. 669 */ 670 ehci->async->qh_next.qh = NULL; 671 hw = ehci->async->hw; 672 hw->hw_next = QH_NEXT(ehci, ehci->async->qh_dma); 673 hw->hw_info1 = cpu_to_hc32(ehci, QH_HEAD); 674 hw->hw_info1 |= cpu_to_hc32(ehci, (1 << 7)); /* I = 1 */ 675 hw->hw_token = cpu_to_hc32(ehci, QTD_STS_HALT); 676 hw->hw_qtd_next = EHCI_LIST_END(ehci); 677 ehci->async->qh_state = QH_STATE_LINKED; 678 hw->hw_alt_next = QTD_NEXT(ehci, ehci->async->dummy->qtd_dma); 679 680 /* clear interrupt enables, set irq latency */ 681 if (log2_irq_thresh < 0 || log2_irq_thresh > 6) 682 log2_irq_thresh = 0; 683 temp = 1 << (16 + log2_irq_thresh); 684 if (HCC_PER_PORT_CHANGE_EVENT(hcc_params)) { 685 ehci->has_ppcd = 1; 686 ehci_dbg(ehci, "enable per-port change event\n"); 687 temp |= CMD_PPCEE; 688 } 689 if (HCC_CANPARK(hcc_params)) { 690 /* HW default park == 3, on hardware that supports it (like 691 * NVidia and ALI silicon), maximizes throughput on the async 692 * schedule by avoiding QH fetches between transfers. 693 * 694 * With fast usb storage devices and NForce2, "park" seems to 695 * make problems: throughput reduction (!), data errors... 696 */ 697 if (park) { 698 park = min(park, (unsigned) 3); 699 temp |= CMD_PARK; 700 temp |= park << 8; 701 } 702 ehci_dbg(ehci, "park %d\n", park); 703 } 704 if (HCC_PGM_FRAMELISTLEN(hcc_params)) { 705 /* periodic schedule size can be smaller than default */ 706 temp &= ~(3 << 2); 707 temp |= (EHCI_TUNE_FLS << 2); 708 } 709 if (HCC_LPM(hcc_params)) { 710 /* support link power management EHCI 1.1 addendum */ 711 ehci_dbg(ehci, "support lpm\n"); 712 ehci->has_lpm = 1; 713 if (hird > 0xf) { 714 ehci_dbg(ehci, "hird %d invalid, use default 0", 715 hird); 716 hird = 0; 717 } 718 temp |= hird << 24; 719 } 720 ehci->command = temp; 721 722 /* Accept arbitrarily long scatter-gather lists */ 723 if (!(hcd->driver->flags & HCD_LOCAL_MEM)) 724 hcd->self.sg_tablesize = ~0; 725 return 0; 726 } 727 728 /* start HC running; it's halted, ehci_init() has been run (once) */ 729 static int ehci_run (struct usb_hcd *hcd) 730 { 731 struct ehci_hcd *ehci = hcd_to_ehci (hcd); 732 u32 temp; 733 u32 hcc_params; 734 735 hcd->uses_new_polling = 1; 736 737 /* EHCI spec section 4.1 */ 738 739 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); 740 ehci_writel(ehci, (u32)ehci->async->qh_dma, &ehci->regs->async_next); 741 742 /* 743 * hcc_params controls whether ehci->regs->segment must (!!!) 744 * be used; it constrains QH/ITD/SITD and QTD locations. 745 * pci_pool consistent memory always uses segment zero. 746 * streaming mappings for I/O buffers, like pci_map_single(), 747 * can return segments above 4GB, if the device allows. 748 * 749 * NOTE: the dma mask is visible through dma_supported(), so 750 * drivers can pass this info along ... like NETIF_F_HIGHDMA, 751 * Scsi_Host.highmem_io, and so forth. It's readonly to all 752 * host side drivers though. 753 */ 754 hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params); 755 if (HCC_64BIT_ADDR(hcc_params)) { 756 ehci_writel(ehci, 0, &ehci->regs->segment); 757 #if 0 758 // this is deeply broken on almost all architectures 759 if (!dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64))) 760 ehci_info(ehci, "enabled 64bit DMA\n"); 761 #endif 762 } 763 764 765 // Philips, Intel, and maybe others need CMD_RUN before the 766 // root hub will detect new devices (why?); NEC doesn't 767 ehci->command &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET); 768 ehci->command |= CMD_RUN; 769 ehci_writel(ehci, ehci->command, &ehci->regs->command); 770 dbg_cmd (ehci, "init", ehci->command); 771 772 /* 773 * Start, enabling full USB 2.0 functionality ... usb 1.1 devices 774 * are explicitly handed to companion controller(s), so no TT is 775 * involved with the root hub. (Except where one is integrated, 776 * and there's no companion controller unless maybe for USB OTG.) 777 * 778 * Turning on the CF flag will transfer ownership of all ports 779 * from the companions to the EHCI controller. If any of the 780 * companions are in the middle of a port reset at the time, it 781 * could cause trouble. Write-locking ehci_cf_port_reset_rwsem 782 * guarantees that no resets are in progress. After we set CF, 783 * a short delay lets the hardware catch up; new resets shouldn't 784 * be started before the port switching actions could complete. 785 */ 786 down_write(&ehci_cf_port_reset_rwsem); 787 ehci->rh_state = EHCI_RH_RUNNING; 788 ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag); 789 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ 790 msleep(5); 791 up_write(&ehci_cf_port_reset_rwsem); 792 ehci->last_periodic_enable = ktime_get_real(); 793 794 temp = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)); 795 ehci_info (ehci, 796 "USB %x.%x started, EHCI %x.%02x%s\n", 797 ((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f), 798 temp >> 8, temp & 0xff, 799 ignore_oc ? ", overcurrent ignored" : ""); 800 801 ehci_writel(ehci, INTR_MASK, 802 &ehci->regs->intr_enable); /* Turn On Interrupts */ 803 804 /* GRR this is run-once init(), being done every time the HC starts. 805 * So long as they're part of class devices, we can't do it init() 806 * since the class device isn't created that early. 807 */ 808 create_debug_files(ehci); 809 create_sysfs_files(ehci); 810 811 return 0; 812 } 813 814 static int __maybe_unused ehci_setup (struct usb_hcd *hcd) 815 { 816 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 817 int retval; 818 819 ehci->regs = (void __iomem *)ehci->caps + 820 HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)); 821 dbg_hcs_params(ehci, "reset"); 822 dbg_hcc_params(ehci, "reset"); 823 824 /* cache this readonly data; minimize chip reads */ 825 ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); 826 827 ehci->sbrn = HCD_USB2; 828 829 retval = ehci_halt(ehci); 830 if (retval) 831 return retval; 832 833 /* data structure init */ 834 retval = ehci_init(hcd); 835 if (retval) 836 return retval; 837 838 ehci_reset(ehci); 839 840 return 0; 841 } 842 843 /*-------------------------------------------------------------------------*/ 844 845 static irqreturn_t ehci_irq (struct usb_hcd *hcd) 846 { 847 struct ehci_hcd *ehci = hcd_to_ehci (hcd); 848 u32 status, masked_status, pcd_status = 0, cmd; 849 int bh; 850 851 spin_lock (&ehci->lock); 852 853 status = ehci_readl(ehci, &ehci->regs->status); 854 855 /* e.g. cardbus physical eject */ 856 if (status == ~(u32) 0) { 857 ehci_dbg (ehci, "device removed\n"); 858 goto dead; 859 } 860 861 /* 862 * We don't use STS_FLR, but some controllers don't like it to 863 * remain on, so mask it out along with the other status bits. 864 */ 865 masked_status = status & (INTR_MASK | STS_FLR); 866 867 /* Shared IRQ? */ 868 if (!masked_status || unlikely(ehci->rh_state == EHCI_RH_HALTED)) { 869 spin_unlock(&ehci->lock); 870 return IRQ_NONE; 871 } 872 873 /* clear (just) interrupts */ 874 ehci_writel(ehci, masked_status, &ehci->regs->status); 875 cmd = ehci_readl(ehci, &ehci->regs->command); 876 bh = 0; 877 878 #ifdef VERBOSE_DEBUG 879 /* unrequested/ignored: Frame List Rollover */ 880 dbg_status (ehci, "irq", status); 881 #endif 882 883 /* INT, ERR, and IAA interrupt rates can be throttled */ 884 885 /* normal [4.15.1.2] or error [4.15.1.1] completion */ 886 if (likely ((status & (STS_INT|STS_ERR)) != 0)) { 887 if (likely ((status & STS_ERR) == 0)) 888 COUNT (ehci->stats.normal); 889 else 890 COUNT (ehci->stats.error); 891 bh = 1; 892 } 893 894 /* complete the unlinking of some qh [4.15.2.3] */ 895 if (status & STS_IAA) { 896 /* guard against (alleged) silicon errata */ 897 if (cmd & CMD_IAAD) 898 ehci_dbg(ehci, "IAA with IAAD still set?\n"); 899 if (ehci->reclaim) { 900 COUNT(ehci->stats.reclaim); 901 end_unlink_async(ehci); 902 } else 903 ehci_dbg(ehci, "IAA with nothing to reclaim?\n"); 904 } 905 906 /* remote wakeup [4.3.1] */ 907 if (status & STS_PCD) { 908 unsigned i = HCS_N_PORTS (ehci->hcs_params); 909 u32 ppcd = 0; 910 911 /* kick root hub later */ 912 pcd_status = status; 913 914 /* resume root hub? */ 915 if (ehci->rh_state == EHCI_RH_SUSPENDED) 916 usb_hcd_resume_root_hub(hcd); 917 918 /* get per-port change detect bits */ 919 if (ehci->has_ppcd) 920 ppcd = status >> 16; 921 922 while (i--) { 923 int pstatus; 924 925 /* leverage per-port change bits feature */ 926 if (ehci->has_ppcd && !(ppcd & (1 << i))) 927 continue; 928 pstatus = ehci_readl(ehci, 929 &ehci->regs->port_status[i]); 930 931 if (pstatus & PORT_OWNER) 932 continue; 933 if (!(test_bit(i, &ehci->suspended_ports) && 934 ((pstatus & PORT_RESUME) || 935 !(pstatus & PORT_SUSPEND)) && 936 (pstatus & PORT_PE) && 937 ehci->reset_done[i] == 0)) 938 continue; 939 940 /* start 20 msec resume signaling from this port, 941 * and make khubd collect PORT_STAT_C_SUSPEND to 942 * stop that signaling. Use 5 ms extra for safety, 943 * like usb_port_resume() does. 944 */ 945 ehci->reset_done[i] = jiffies + msecs_to_jiffies(25); 946 set_bit(i, &ehci->resuming_ports); 947 ehci_dbg (ehci, "port %d remote wakeup\n", i + 1); 948 mod_timer(&hcd->rh_timer, ehci->reset_done[i]); 949 } 950 } 951 952 /* PCI errors [4.15.2.4] */ 953 if (unlikely ((status & STS_FATAL) != 0)) { 954 ehci_err(ehci, "fatal error\n"); 955 dbg_cmd(ehci, "fatal", cmd); 956 dbg_status(ehci, "fatal", status); 957 ehci_halt(ehci); 958 dead: 959 ehci_reset(ehci); 960 ehci_writel(ehci, 0, &ehci->regs->configured_flag); 961 usb_hc_died(hcd); 962 /* generic layer kills/unlinks all urbs, then 963 * uses ehci_stop to clean up the rest 964 */ 965 bh = 1; 966 } 967 968 if (bh) 969 ehci_work (ehci); 970 spin_unlock (&ehci->lock); 971 if (pcd_status) 972 usb_hcd_poll_rh_status(hcd); 973 return IRQ_HANDLED; 974 } 975 976 /*-------------------------------------------------------------------------*/ 977 978 /* 979 * non-error returns are a promise to giveback() the urb later 980 * we drop ownership so next owner (or urb unlink) can get it 981 * 982 * urb + dev is in hcd.self.controller.urb_list 983 * we're queueing TDs onto software and hardware lists 984 * 985 * hcd-specific init for hcpriv hasn't been done yet 986 * 987 * NOTE: control, bulk, and interrupt share the same code to append TDs 988 * to a (possibly active) QH, and the same QH scanning code. 989 */ 990 static int ehci_urb_enqueue ( 991 struct usb_hcd *hcd, 992 struct urb *urb, 993 gfp_t mem_flags 994 ) { 995 struct ehci_hcd *ehci = hcd_to_ehci (hcd); 996 struct list_head qtd_list; 997 998 INIT_LIST_HEAD (&qtd_list); 999 1000 switch (usb_pipetype (urb->pipe)) { 1001 case PIPE_CONTROL: 1002 /* qh_completions() code doesn't handle all the fault cases 1003 * in multi-TD control transfers. Even 1KB is rare anyway. 1004 */ 1005 if (urb->transfer_buffer_length > (16 * 1024)) 1006 return -EMSGSIZE; 1007 /* FALLTHROUGH */ 1008 /* case PIPE_BULK: */ 1009 default: 1010 if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags)) 1011 return -ENOMEM; 1012 return submit_async(ehci, urb, &qtd_list, mem_flags); 1013 1014 case PIPE_INTERRUPT: 1015 if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags)) 1016 return -ENOMEM; 1017 return intr_submit(ehci, urb, &qtd_list, mem_flags); 1018 1019 case PIPE_ISOCHRONOUS: 1020 if (urb->dev->speed == USB_SPEED_HIGH) 1021 return itd_submit (ehci, urb, mem_flags); 1022 else 1023 return sitd_submit (ehci, urb, mem_flags); 1024 } 1025 } 1026 1027 static void unlink_async (struct ehci_hcd *ehci, struct ehci_qh *qh) 1028 { 1029 /* failfast */ 1030 if (ehci->rh_state != EHCI_RH_RUNNING && ehci->reclaim) 1031 end_unlink_async(ehci); 1032 1033 /* If the QH isn't linked then there's nothing we can do 1034 * unless we were called during a giveback, in which case 1035 * qh_completions() has to deal with it. 1036 */ 1037 if (qh->qh_state != QH_STATE_LINKED) { 1038 if (qh->qh_state == QH_STATE_COMPLETING) 1039 qh->needs_rescan = 1; 1040 return; 1041 } 1042 1043 /* defer till later if busy */ 1044 if (ehci->reclaim) { 1045 struct ehci_qh *last; 1046 1047 for (last = ehci->reclaim; 1048 last->reclaim; 1049 last = last->reclaim) 1050 continue; 1051 qh->qh_state = QH_STATE_UNLINK_WAIT; 1052 last->reclaim = qh; 1053 1054 /* start IAA cycle */ 1055 } else 1056 start_unlink_async (ehci, qh); 1057 } 1058 1059 /* remove from hardware lists 1060 * completions normally happen asynchronously 1061 */ 1062 1063 static int ehci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) 1064 { 1065 struct ehci_hcd *ehci = hcd_to_ehci (hcd); 1066 struct ehci_qh *qh; 1067 unsigned long flags; 1068 int rc; 1069 1070 spin_lock_irqsave (&ehci->lock, flags); 1071 rc = usb_hcd_check_unlink_urb(hcd, urb, status); 1072 if (rc) 1073 goto done; 1074 1075 switch (usb_pipetype (urb->pipe)) { 1076 // case PIPE_CONTROL: 1077 // case PIPE_BULK: 1078 default: 1079 qh = (struct ehci_qh *) urb->hcpriv; 1080 if (!qh) 1081 break; 1082 switch (qh->qh_state) { 1083 case QH_STATE_LINKED: 1084 case QH_STATE_COMPLETING: 1085 unlink_async(ehci, qh); 1086 break; 1087 case QH_STATE_UNLINK: 1088 case QH_STATE_UNLINK_WAIT: 1089 /* already started */ 1090 break; 1091 case QH_STATE_IDLE: 1092 /* QH might be waiting for a Clear-TT-Buffer */ 1093 qh_completions(ehci, qh); 1094 break; 1095 } 1096 break; 1097 1098 case PIPE_INTERRUPT: 1099 qh = (struct ehci_qh *) urb->hcpriv; 1100 if (!qh) 1101 break; 1102 switch (qh->qh_state) { 1103 case QH_STATE_LINKED: 1104 case QH_STATE_COMPLETING: 1105 intr_deschedule (ehci, qh); 1106 break; 1107 case QH_STATE_IDLE: 1108 qh_completions (ehci, qh); 1109 break; 1110 default: 1111 ehci_dbg (ehci, "bogus qh %p state %d\n", 1112 qh, qh->qh_state); 1113 goto done; 1114 } 1115 break; 1116 1117 case PIPE_ISOCHRONOUS: 1118 // itd or sitd ... 1119 1120 // wait till next completion, do it then. 1121 // completion irqs can wait up to 1024 msec, 1122 break; 1123 } 1124 done: 1125 spin_unlock_irqrestore (&ehci->lock, flags); 1126 return rc; 1127 } 1128 1129 /*-------------------------------------------------------------------------*/ 1130 1131 // bulk qh holds the data toggle 1132 1133 static void 1134 ehci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep) 1135 { 1136 struct ehci_hcd *ehci = hcd_to_ehci (hcd); 1137 unsigned long flags; 1138 struct ehci_qh *qh, *tmp; 1139 1140 /* ASSERT: any requests/urbs are being unlinked */ 1141 /* ASSERT: nobody can be submitting urbs for this any more */ 1142 1143 rescan: 1144 spin_lock_irqsave (&ehci->lock, flags); 1145 qh = ep->hcpriv; 1146 if (!qh) 1147 goto done; 1148 1149 /* endpoints can be iso streams. for now, we don't 1150 * accelerate iso completions ... so spin a while. 1151 */ 1152 if (qh->hw == NULL) { 1153 ehci_vdbg (ehci, "iso delay\n"); 1154 goto idle_timeout; 1155 } 1156 1157 if (ehci->rh_state != EHCI_RH_RUNNING) 1158 qh->qh_state = QH_STATE_IDLE; 1159 switch (qh->qh_state) { 1160 case QH_STATE_LINKED: 1161 case QH_STATE_COMPLETING: 1162 for (tmp = ehci->async->qh_next.qh; 1163 tmp && tmp != qh; 1164 tmp = tmp->qh_next.qh) 1165 continue; 1166 /* periodic qh self-unlinks on empty, and a COMPLETING qh 1167 * may already be unlinked. 1168 */ 1169 if (tmp) 1170 unlink_async(ehci, qh); 1171 /* FALL THROUGH */ 1172 case QH_STATE_UNLINK: /* wait for hw to finish? */ 1173 case QH_STATE_UNLINK_WAIT: 1174 idle_timeout: 1175 spin_unlock_irqrestore (&ehci->lock, flags); 1176 schedule_timeout_uninterruptible(1); 1177 goto rescan; 1178 case QH_STATE_IDLE: /* fully unlinked */ 1179 if (qh->clearing_tt) 1180 goto idle_timeout; 1181 if (list_empty (&qh->qtd_list)) { 1182 qh_put (qh); 1183 break; 1184 } 1185 /* else FALL THROUGH */ 1186 default: 1187 /* caller was supposed to have unlinked any requests; 1188 * that's not our job. just leak this memory. 1189 */ 1190 ehci_err (ehci, "qh %p (#%02x) state %d%s\n", 1191 qh, ep->desc.bEndpointAddress, qh->qh_state, 1192 list_empty (&qh->qtd_list) ? "" : "(has tds)"); 1193 break; 1194 } 1195 ep->hcpriv = NULL; 1196 done: 1197 spin_unlock_irqrestore (&ehci->lock, flags); 1198 } 1199 1200 static void 1201 ehci_endpoint_reset(struct usb_hcd *hcd, struct usb_host_endpoint *ep) 1202 { 1203 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 1204 struct ehci_qh *qh; 1205 int eptype = usb_endpoint_type(&ep->desc); 1206 int epnum = usb_endpoint_num(&ep->desc); 1207 int is_out = usb_endpoint_dir_out(&ep->desc); 1208 unsigned long flags; 1209 1210 if (eptype != USB_ENDPOINT_XFER_BULK && eptype != USB_ENDPOINT_XFER_INT) 1211 return; 1212 1213 spin_lock_irqsave(&ehci->lock, flags); 1214 qh = ep->hcpriv; 1215 1216 /* For Bulk and Interrupt endpoints we maintain the toggle state 1217 * in the hardware; the toggle bits in udev aren't used at all. 1218 * When an endpoint is reset by usb_clear_halt() we must reset 1219 * the toggle bit in the QH. 1220 */ 1221 if (qh) { 1222 usb_settoggle(qh->dev, epnum, is_out, 0); 1223 if (!list_empty(&qh->qtd_list)) { 1224 WARN_ONCE(1, "clear_halt for a busy endpoint\n"); 1225 } else if (qh->qh_state == QH_STATE_LINKED || 1226 qh->qh_state == QH_STATE_COMPLETING) { 1227 1228 /* The toggle value in the QH can't be updated 1229 * while the QH is active. Unlink it now; 1230 * re-linking will call qh_refresh(). 1231 */ 1232 if (eptype == USB_ENDPOINT_XFER_BULK) 1233 unlink_async(ehci, qh); 1234 else 1235 intr_deschedule(ehci, qh); 1236 } 1237 } 1238 spin_unlock_irqrestore(&ehci->lock, flags); 1239 } 1240 1241 static int ehci_get_frame (struct usb_hcd *hcd) 1242 { 1243 struct ehci_hcd *ehci = hcd_to_ehci (hcd); 1244 return (ehci_read_frame_index(ehci) >> 3) % ehci->periodic_size; 1245 } 1246 1247 /*-------------------------------------------------------------------------*/ 1248 /* 1249 * The EHCI in ChipIdea HDRC cannot be a separate module or device, 1250 * because its registers (and irq) are shared between host/gadget/otg 1251 * functions and in order to facilitate role switching we cannot 1252 * give the ehci driver exclusive access to those. 1253 */ 1254 #ifndef CHIPIDEA_EHCI 1255 1256 MODULE_DESCRIPTION(DRIVER_DESC); 1257 MODULE_AUTHOR (DRIVER_AUTHOR); 1258 MODULE_LICENSE ("GPL"); 1259 1260 #ifdef CONFIG_PCI 1261 #include "ehci-pci.c" 1262 #define PCI_DRIVER ehci_pci_driver 1263 #endif 1264 1265 #ifdef CONFIG_USB_EHCI_FSL 1266 #include "ehci-fsl.c" 1267 #define PLATFORM_DRIVER ehci_fsl_driver 1268 #endif 1269 1270 #ifdef CONFIG_USB_EHCI_MXC 1271 #include "ehci-mxc.c" 1272 #define PLATFORM_DRIVER ehci_mxc_driver 1273 #endif 1274 1275 #ifdef CONFIG_USB_EHCI_SH 1276 #include "ehci-sh.c" 1277 #define PLATFORM_DRIVER ehci_hcd_sh_driver 1278 #endif 1279 1280 #ifdef CONFIG_MIPS_ALCHEMY 1281 #include "ehci-au1xxx.c" 1282 #define PLATFORM_DRIVER ehci_hcd_au1xxx_driver 1283 #endif 1284 1285 #ifdef CONFIG_USB_EHCI_HCD_OMAP 1286 #include "ehci-omap.c" 1287 #define PLATFORM_DRIVER ehci_hcd_omap_driver 1288 #endif 1289 1290 #ifdef CONFIG_PPC_PS3 1291 #include "ehci-ps3.c" 1292 #define PS3_SYSTEM_BUS_DRIVER ps3_ehci_driver 1293 #endif 1294 1295 #ifdef CONFIG_USB_EHCI_HCD_PPC_OF 1296 #include "ehci-ppc-of.c" 1297 #define OF_PLATFORM_DRIVER ehci_hcd_ppc_of_driver 1298 #endif 1299 1300 #ifdef CONFIG_XPS_USB_HCD_XILINX 1301 #include "ehci-xilinx-of.c" 1302 #define XILINX_OF_PLATFORM_DRIVER ehci_hcd_xilinx_of_driver 1303 #endif 1304 1305 #ifdef CONFIG_PLAT_ORION 1306 #include "ehci-orion.c" 1307 #define PLATFORM_DRIVER ehci_orion_driver 1308 #endif 1309 1310 #ifdef CONFIG_ARCH_IXP4XX 1311 #include "ehci-ixp4xx.c" 1312 #define PLATFORM_DRIVER ixp4xx_ehci_driver 1313 #endif 1314 1315 #ifdef CONFIG_USB_W90X900_EHCI 1316 #include "ehci-w90x900.c" 1317 #define PLATFORM_DRIVER ehci_hcd_w90x900_driver 1318 #endif 1319 1320 #ifdef CONFIG_ARCH_AT91 1321 #include "ehci-atmel.c" 1322 #define PLATFORM_DRIVER ehci_atmel_driver 1323 #endif 1324 1325 #ifdef CONFIG_USB_OCTEON_EHCI 1326 #include "ehci-octeon.c" 1327 #define PLATFORM_DRIVER ehci_octeon_driver 1328 #endif 1329 1330 #ifdef CONFIG_USB_CNS3XXX_EHCI 1331 #include "ehci-cns3xxx.c" 1332 #define PLATFORM_DRIVER cns3xxx_ehci_driver 1333 #endif 1334 1335 #ifdef CONFIG_ARCH_VT8500 1336 #include "ehci-vt8500.c" 1337 #define PLATFORM_DRIVER vt8500_ehci_driver 1338 #endif 1339 1340 #ifdef CONFIG_PLAT_SPEAR 1341 #include "ehci-spear.c" 1342 #define PLATFORM_DRIVER spear_ehci_hcd_driver 1343 #endif 1344 1345 #ifdef CONFIG_USB_EHCI_MSM 1346 #include "ehci-msm.c" 1347 #define PLATFORM_DRIVER ehci_msm_driver 1348 #endif 1349 1350 #ifdef CONFIG_USB_EHCI_HCD_PMC_MSP 1351 #include "ehci-pmcmsp.c" 1352 #define PLATFORM_DRIVER ehci_hcd_msp_driver 1353 #endif 1354 1355 #ifdef CONFIG_USB_EHCI_TEGRA 1356 #include "ehci-tegra.c" 1357 #define PLATFORM_DRIVER tegra_ehci_driver 1358 #endif 1359 1360 #ifdef CONFIG_USB_EHCI_S5P 1361 #include "ehci-s5p.c" 1362 #define PLATFORM_DRIVER s5p_ehci_driver 1363 #endif 1364 1365 #ifdef CONFIG_SPARC_LEON 1366 #include "ehci-grlib.c" 1367 #define PLATFORM_DRIVER ehci_grlib_driver 1368 #endif 1369 1370 #ifdef CONFIG_CPU_XLR 1371 #include "ehci-xls.c" 1372 #define PLATFORM_DRIVER ehci_xls_driver 1373 #endif 1374 1375 #ifdef CONFIG_USB_EHCI_MV 1376 #include "ehci-mv.c" 1377 #define PLATFORM_DRIVER ehci_mv_driver 1378 #endif 1379 1380 #ifdef CONFIG_MACH_LOONGSON1 1381 #include "ehci-ls1x.c" 1382 #define PLATFORM_DRIVER ehci_ls1x_driver 1383 #endif 1384 1385 #ifdef CONFIG_MIPS_SEAD3 1386 #include "ehci-sead3.c" 1387 #define PLATFORM_DRIVER ehci_hcd_sead3_driver 1388 #endif 1389 1390 #ifdef CONFIG_USB_EHCI_HCD_PLATFORM 1391 #include "ehci-platform.c" 1392 #define PLATFORM_DRIVER ehci_platform_driver 1393 #endif 1394 1395 #if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \ 1396 !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \ 1397 !defined(XILINX_OF_PLATFORM_DRIVER) 1398 #error "missing bus glue for ehci-hcd" 1399 #endif 1400 1401 static int __init ehci_hcd_init(void) 1402 { 1403 int retval = 0; 1404 1405 if (usb_disabled()) 1406 return -ENODEV; 1407 1408 printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name); 1409 set_bit(USB_EHCI_LOADED, &usb_hcds_loaded); 1410 if (test_bit(USB_UHCI_LOADED, &usb_hcds_loaded) || 1411 test_bit(USB_OHCI_LOADED, &usb_hcds_loaded)) 1412 printk(KERN_WARNING "Warning! ehci_hcd should always be loaded" 1413 " before uhci_hcd and ohci_hcd, not after\n"); 1414 1415 pr_debug("%s: block sizes: qh %Zd qtd %Zd itd %Zd sitd %Zd\n", 1416 hcd_name, 1417 sizeof(struct ehci_qh), sizeof(struct ehci_qtd), 1418 sizeof(struct ehci_itd), sizeof(struct ehci_sitd)); 1419 1420 #ifdef DEBUG 1421 ehci_debug_root = debugfs_create_dir("ehci", usb_debug_root); 1422 if (!ehci_debug_root) { 1423 retval = -ENOENT; 1424 goto err_debug; 1425 } 1426 #endif 1427 1428 #ifdef PLATFORM_DRIVER 1429 retval = platform_driver_register(&PLATFORM_DRIVER); 1430 if (retval < 0) 1431 goto clean0; 1432 #endif 1433 1434 #ifdef PCI_DRIVER 1435 retval = pci_register_driver(&PCI_DRIVER); 1436 if (retval < 0) 1437 goto clean1; 1438 #endif 1439 1440 #ifdef PS3_SYSTEM_BUS_DRIVER 1441 retval = ps3_ehci_driver_register(&PS3_SYSTEM_BUS_DRIVER); 1442 if (retval < 0) 1443 goto clean2; 1444 #endif 1445 1446 #ifdef OF_PLATFORM_DRIVER 1447 retval = platform_driver_register(&OF_PLATFORM_DRIVER); 1448 if (retval < 0) 1449 goto clean3; 1450 #endif 1451 1452 #ifdef XILINX_OF_PLATFORM_DRIVER 1453 retval = platform_driver_register(&XILINX_OF_PLATFORM_DRIVER); 1454 if (retval < 0) 1455 goto clean4; 1456 #endif 1457 return retval; 1458 1459 #ifdef XILINX_OF_PLATFORM_DRIVER 1460 /* platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER); */ 1461 clean4: 1462 #endif 1463 #ifdef OF_PLATFORM_DRIVER 1464 platform_driver_unregister(&OF_PLATFORM_DRIVER); 1465 clean3: 1466 #endif 1467 #ifdef PS3_SYSTEM_BUS_DRIVER 1468 ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER); 1469 clean2: 1470 #endif 1471 #ifdef PCI_DRIVER 1472 pci_unregister_driver(&PCI_DRIVER); 1473 clean1: 1474 #endif 1475 #ifdef PLATFORM_DRIVER 1476 platform_driver_unregister(&PLATFORM_DRIVER); 1477 clean0: 1478 #endif 1479 #ifdef DEBUG 1480 debugfs_remove(ehci_debug_root); 1481 ehci_debug_root = NULL; 1482 err_debug: 1483 #endif 1484 clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded); 1485 return retval; 1486 } 1487 module_init(ehci_hcd_init); 1488 1489 static void __exit ehci_hcd_cleanup(void) 1490 { 1491 #ifdef XILINX_OF_PLATFORM_DRIVER 1492 platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER); 1493 #endif 1494 #ifdef OF_PLATFORM_DRIVER 1495 platform_driver_unregister(&OF_PLATFORM_DRIVER); 1496 #endif 1497 #ifdef PLATFORM_DRIVER 1498 platform_driver_unregister(&PLATFORM_DRIVER); 1499 #endif 1500 #ifdef PCI_DRIVER 1501 pci_unregister_driver(&PCI_DRIVER); 1502 #endif 1503 #ifdef PS3_SYSTEM_BUS_DRIVER 1504 ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER); 1505 #endif 1506 #ifdef DEBUG 1507 debugfs_remove(ehci_debug_root); 1508 #endif 1509 clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded); 1510 } 1511 module_exit(ehci_hcd_cleanup); 1512 1513 #endif /* CHIPIDEA_EHCI */ 1514