Merge tag 'xceiv-for-v3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi...
[pandora-kernel.git] / drivers / usb / host / ehci-hcd.c
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             tmp;
207
208         tmp = ehci_readl(ehci, &ehci->regs->usbmode);
209         return (tmp & 3) == USBMODE_CM_HC;
210 }
211
212 /* force HC to halt state from unknown (EHCI spec section 2.3) */
213 static int ehci_halt (struct ehci_hcd *ehci)
214 {
215         u32     temp = ehci_readl(ehci, &ehci->regs->status);
216
217         /* disable any irqs left enabled by previous code */
218         ehci_writel(ehci, 0, &ehci->regs->intr_enable);
219
220         if (ehci_is_TDI(ehci) && tdi_in_host_mode(ehci) == 0) {
221                 return 0;
222         }
223
224         if ((temp & STS_HALT) != 0)
225                 return 0;
226
227         /*
228          * This routine gets called during probe before ehci->command
229          * has been initialized, so we can't rely on its value.
230          */
231         ehci->command &= ~CMD_RUN;
232         temp = ehci_readl(ehci, &ehci->regs->command);
233         temp &= ~(CMD_RUN | CMD_IAAD);
234         ehci_writel(ehci, temp, &ehci->regs->command);
235         return handshake (ehci, &ehci->regs->status,
236                           STS_HALT, STS_HALT, 16 * 125);
237 }
238
239 #if defined(CONFIG_USB_SUSPEND) && defined(CONFIG_PPC_PS3)
240
241 /*
242  * The EHCI controller of the Cell Super Companion Chip used in the
243  * PS3 will stop the root hub after all root hub ports are suspended.
244  * When in this condition handshake will return -ETIMEDOUT.  The
245  * STS_HLT bit will not be set, so inspection of the frame index is
246  * used here to test for the condition.  If the condition is found
247  * return success to allow the USB suspend to complete.
248  */
249
250 static int handshake_for_broken_root_hub(struct ehci_hcd *ehci,
251                                          void __iomem *ptr, u32 mask, u32 done,
252                                          int usec)
253 {
254         unsigned int old_index;
255         int error;
256
257         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
258                 return -ETIMEDOUT;
259
260         old_index = ehci_read_frame_index(ehci);
261
262         error = handshake(ehci, ptr, mask, done, usec);
263
264         if (error == -ETIMEDOUT && ehci_read_frame_index(ehci) == old_index)
265                 return 0;
266
267         return error;
268 }
269
270 #else
271
272 static int handshake_for_broken_root_hub(struct ehci_hcd *ehci,
273                                          void __iomem *ptr, u32 mask, u32 done,
274                                          int usec)
275 {
276         return -ETIMEDOUT;
277 }
278
279 #endif
280
281 static int handshake_on_error_set_halt(struct ehci_hcd *ehci, void __iomem *ptr,
282                                        u32 mask, u32 done, int usec)
283 {
284         int error;
285
286         error = handshake(ehci, ptr, mask, done, usec);
287         if (error == -ETIMEDOUT)
288                 error = handshake_for_broken_root_hub(ehci, ptr, mask, done,
289                                                       usec);
290
291         if (error) {
292                 ehci_halt(ehci);
293                 ehci->rh_state = EHCI_RH_HALTED;
294                 ehci_err(ehci, "force halt; handshake %p %08x %08x -> %d\n",
295                         ptr, mask, done, error);
296         }
297
298         return error;
299 }
300
301 /* put TDI/ARC silicon into EHCI mode */
302 static void tdi_reset (struct ehci_hcd *ehci)
303 {
304         u32             tmp;
305
306         tmp = ehci_readl(ehci, &ehci->regs->usbmode);
307         tmp |= USBMODE_CM_HC;
308         /* The default byte access to MMR space is LE after
309          * controller reset. Set the required endian mode
310          * for transfer buffers to match the host microprocessor
311          */
312         if (ehci_big_endian_mmio(ehci))
313                 tmp |= USBMODE_BE;
314         ehci_writel(ehci, tmp, &ehci->regs->usbmode);
315 }
316
317 /* reset a non-running (STS_HALT == 1) controller */
318 static int ehci_reset (struct ehci_hcd *ehci)
319 {
320         int     retval;
321         u32     command = ehci_readl(ehci, &ehci->regs->command);
322
323         /* If the EHCI debug controller is active, special care must be
324          * taken before and after a host controller reset */
325         if (ehci->debug && !dbgp_reset_prep())
326                 ehci->debug = NULL;
327
328         command |= CMD_RESET;
329         dbg_cmd (ehci, "reset", command);
330         ehci_writel(ehci, command, &ehci->regs->command);
331         ehci->rh_state = EHCI_RH_HALTED;
332         ehci->next_statechange = jiffies;
333         retval = handshake (ehci, &ehci->regs->command,
334                             CMD_RESET, 0, 250 * 1000);
335
336         if (ehci->has_hostpc) {
337                 ehci_writel(ehci, USBMODE_EX_HC | USBMODE_EX_VBPS,
338                                 &ehci->regs->usbmode_ex);
339                 ehci_writel(ehci, TXFIFO_DEFAULT, &ehci->regs->txfill_tuning);
340         }
341         if (retval)
342                 return retval;
343
344         if (ehci_is_TDI(ehci))
345                 tdi_reset (ehci);
346
347         if (ehci->debug)
348                 dbgp_external_startup();
349
350         ehci->port_c_suspend = ehci->suspended_ports =
351                         ehci->resuming_ports = 0;
352         return retval;
353 }
354
355 /* idle the controller (from running) */
356 static void ehci_quiesce (struct ehci_hcd *ehci)
357 {
358         u32     temp;
359
360 #ifdef DEBUG
361         if (ehci->rh_state != EHCI_RH_RUNNING)
362                 BUG ();
363 #endif
364
365         /* wait for any schedule enables/disables to take effect */
366         temp = (ehci->command << 10) & (STS_ASS | STS_PSS);
367         if (handshake_on_error_set_halt(ehci, &ehci->regs->status,
368                                         STS_ASS | STS_PSS, temp, 16 * 125))
369                 return;
370
371         /* then disable anything that's still active */
372         ehci->command &= ~(CMD_ASE | CMD_PSE);
373         ehci_writel(ehci, ehci->command, &ehci->regs->command);
374
375         /* hardware can take 16 microframes to turn off ... */
376         handshake_on_error_set_halt(ehci, &ehci->regs->status,
377                                     STS_ASS | STS_PSS, 0, 16 * 125);
378 }
379
380 /*-------------------------------------------------------------------------*/
381
382 static void end_unlink_async(struct ehci_hcd *ehci);
383 static void ehci_work(struct ehci_hcd *ehci);
384
385 #include "ehci-hub.c"
386 #include "ehci-lpm.c"
387 #include "ehci-mem.c"
388 #include "ehci-q.c"
389 #include "ehci-sched.c"
390 #include "ehci-sysfs.c"
391
392 /*-------------------------------------------------------------------------*/
393
394 static void ehci_iaa_watchdog(unsigned long param)
395 {
396         struct ehci_hcd         *ehci = (struct ehci_hcd *) param;
397         unsigned long           flags;
398
399         spin_lock_irqsave (&ehci->lock, flags);
400
401         /* Lost IAA irqs wedge things badly; seen first with a vt8235.
402          * So we need this watchdog, but must protect it against both
403          * (a) SMP races against real IAA firing and retriggering, and
404          * (b) clean HC shutdown, when IAA watchdog was pending.
405          */
406         if (ehci->reclaim
407                         && !timer_pending(&ehci->iaa_watchdog)
408                         && ehci->rh_state == EHCI_RH_RUNNING) {
409                 u32 cmd, status;
410
411                 /* If we get here, IAA is *REALLY* late.  It's barely
412                  * conceivable that the system is so busy that CMD_IAAD
413                  * is still legitimately set, so let's be sure it's
414                  * clear before we read STS_IAA.  (The HC should clear
415                  * CMD_IAAD when it sets STS_IAA.)
416                  */
417                 cmd = ehci_readl(ehci, &ehci->regs->command);
418
419                 /* If IAA is set here it either legitimately triggered
420                  * before we cleared IAAD above (but _way_ late, so we'll
421                  * still count it as lost) ... or a silicon erratum:
422                  * - VIA seems to set IAA without triggering the IRQ;
423                  * - IAAD potentially cleared without setting IAA.
424                  */
425                 status = ehci_readl(ehci, &ehci->regs->status);
426                 if ((status & STS_IAA) || !(cmd & CMD_IAAD)) {
427                         COUNT (ehci->stats.lost_iaa);
428                         ehci_writel(ehci, STS_IAA, &ehci->regs->status);
429                 }
430
431                 ehci_vdbg(ehci, "IAA watchdog: status %x cmd %x\n",
432                                 status, cmd);
433                 end_unlink_async(ehci);
434         }
435
436         spin_unlock_irqrestore(&ehci->lock, flags);
437 }
438
439 static void ehci_watchdog(unsigned long param)
440 {
441         struct ehci_hcd         *ehci = (struct ehci_hcd *) param;
442         unsigned long           flags;
443
444         spin_lock_irqsave(&ehci->lock, flags);
445
446         /* stop async processing after it's idled a bit */
447         if (test_bit (TIMER_ASYNC_OFF, &ehci->actions))
448                 start_unlink_async (ehci, ehci->async);
449
450         /* ehci could run by timer, without IRQs ... */
451         ehci_work (ehci);
452
453         spin_unlock_irqrestore (&ehci->lock, flags);
454 }
455
456 /* On some systems, leaving remote wakeup enabled prevents system shutdown.
457  * The firmware seems to think that powering off is a wakeup event!
458  * This routine turns off remote wakeup and everything else, on all ports.
459  */
460 static void ehci_turn_off_all_ports(struct ehci_hcd *ehci)
461 {
462         int     port = HCS_N_PORTS(ehci->hcs_params);
463
464         while (port--)
465                 ehci_writel(ehci, PORT_RWC_BITS,
466                                 &ehci->regs->port_status[port]);
467 }
468
469 /*
470  * Halt HC, turn off all ports, and let the BIOS use the companion controllers.
471  * Should be called with ehci->lock held.
472  */
473 static void ehci_silence_controller(struct ehci_hcd *ehci)
474 {
475         ehci_halt(ehci);
476         ehci_turn_off_all_ports(ehci);
477
478         /* make BIOS/etc use companion controller during reboot */
479         ehci_writel(ehci, 0, &ehci->regs->configured_flag);
480
481         /* unblock posted writes */
482         ehci_readl(ehci, &ehci->regs->configured_flag);
483 }
484
485 /* ehci_shutdown kick in for silicon on any bus (not just pci, etc).
486  * This forcibly disables dma and IRQs, helping kexec and other cases
487  * where the next system software may expect clean state.
488  */
489 static void ehci_shutdown(struct usb_hcd *hcd)
490 {
491         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
492
493         del_timer_sync(&ehci->watchdog);
494         del_timer_sync(&ehci->iaa_watchdog);
495
496         spin_lock_irq(&ehci->lock);
497         ehci_silence_controller(ehci);
498         spin_unlock_irq(&ehci->lock);
499 }
500
501 static void ehci_port_power (struct ehci_hcd *ehci, int is_on)
502 {
503         unsigned port;
504
505         if (!HCS_PPC (ehci->hcs_params))
506                 return;
507
508         ehci_dbg (ehci, "...power%s ports...\n", is_on ? "up" : "down");
509         for (port = HCS_N_PORTS (ehci->hcs_params); port > 0; )
510                 (void) ehci_hub_control(ehci_to_hcd(ehci),
511                                 is_on ? SetPortFeature : ClearPortFeature,
512                                 USB_PORT_FEAT_POWER,
513                                 port--, NULL, 0);
514         /* Flush those writes */
515         ehci_readl(ehci, &ehci->regs->command);
516         msleep(20);
517 }
518
519 /*-------------------------------------------------------------------------*/
520
521 /*
522  * ehci_work is called from some interrupts, timers, and so on.
523  * it calls driver completion functions, after dropping ehci->lock.
524  */
525 static void ehci_work (struct ehci_hcd *ehci)
526 {
527         timer_action_done (ehci, TIMER_IO_WATCHDOG);
528
529         /* another CPU may drop ehci->lock during a schedule scan while
530          * it reports urb completions.  this flag guards against bogus
531          * attempts at re-entrant schedule scanning.
532          */
533         if (ehci->scanning)
534                 return;
535         ehci->scanning = 1;
536         scan_async (ehci);
537         if (ehci->next_uframe != -1)
538                 scan_periodic (ehci);
539         ehci->scanning = 0;
540
541         /* the IO watchdog guards against hardware or driver bugs that
542          * misplace IRQs, and should let us run completely without IRQs.
543          * such lossage has been observed on both VT6202 and VT8235.
544          */
545         if (ehci->rh_state == EHCI_RH_RUNNING &&
546                         (ehci->async->qh_next.ptr != NULL ||
547                          ehci->periodic_sched != 0))
548                 timer_action (ehci, TIMER_IO_WATCHDOG);
549 }
550
551 /*
552  * Called when the ehci_hcd module is removed.
553  */
554 static void ehci_stop (struct usb_hcd *hcd)
555 {
556         struct ehci_hcd         *ehci = hcd_to_ehci (hcd);
557
558         ehci_dbg (ehci, "stop\n");
559
560         /* no more interrupts ... */
561         del_timer_sync (&ehci->watchdog);
562         del_timer_sync(&ehci->iaa_watchdog);
563
564         spin_lock_irq(&ehci->lock);
565         if (ehci->rh_state == EHCI_RH_RUNNING)
566                 ehci_quiesce (ehci);
567
568         ehci_silence_controller(ehci);
569         ehci_reset (ehci);
570         spin_unlock_irq(&ehci->lock);
571
572         remove_sysfs_files(ehci);
573         remove_debug_files (ehci);
574
575         /* root hub is shut down separately (first, when possible) */
576         spin_lock_irq (&ehci->lock);
577         if (ehci->async)
578                 ehci_work (ehci);
579         spin_unlock_irq (&ehci->lock);
580         ehci_mem_cleanup (ehci);
581
582         if (ehci->amd_pll_fix == 1)
583                 usb_amd_dev_put();
584
585 #ifdef  EHCI_STATS
586         ehci_dbg (ehci, "irq normal %ld err %ld reclaim %ld (lost %ld)\n",
587                 ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim,
588                 ehci->stats.lost_iaa);
589         ehci_dbg (ehci, "complete %ld unlink %ld\n",
590                 ehci->stats.complete, ehci->stats.unlink);
591 #endif
592
593         dbg_status (ehci, "ehci_stop completed",
594                     ehci_readl(ehci, &ehci->regs->status));
595 }
596
597 /* one-time init, only for memory state */
598 static int ehci_init(struct usb_hcd *hcd)
599 {
600         struct ehci_hcd         *ehci = hcd_to_ehci(hcd);
601         u32                     temp;
602         int                     retval;
603         u32                     hcc_params;
604         struct ehci_qh_hw       *hw;
605
606         spin_lock_init(&ehci->lock);
607
608         /*
609          * keep io watchdog by default, those good HCDs could turn off it later
610          */
611         ehci->need_io_watchdog = 1;
612         init_timer(&ehci->watchdog);
613         ehci->watchdog.function = ehci_watchdog;
614         ehci->watchdog.data = (unsigned long) ehci;
615
616         init_timer(&ehci->iaa_watchdog);
617         ehci->iaa_watchdog.function = ehci_iaa_watchdog;
618         ehci->iaa_watchdog.data = (unsigned long) ehci;
619
620         hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params);
621
622         /*
623          * by default set standard 80% (== 100 usec/uframe) max periodic
624          * bandwidth as required by USB 2.0
625          */
626         ehci->uframe_periodic_max = 100;
627
628         /*
629          * hw default: 1K periodic list heads, one per frame.
630          * periodic_size can shrink by USBCMD update if hcc_params allows.
631          */
632         ehci->periodic_size = DEFAULT_I_TDPS;
633         INIT_LIST_HEAD(&ehci->cached_itd_list);
634         INIT_LIST_HEAD(&ehci->cached_sitd_list);
635
636         if (HCC_PGM_FRAMELISTLEN(hcc_params)) {
637                 /* periodic schedule size can be smaller than default */
638                 switch (EHCI_TUNE_FLS) {
639                 case 0: ehci->periodic_size = 1024; break;
640                 case 1: ehci->periodic_size = 512; break;
641                 case 2: ehci->periodic_size = 256; break;
642                 default:        BUG();
643                 }
644         }
645         if ((retval = ehci_mem_init(ehci, GFP_KERNEL)) < 0)
646                 return retval;
647
648         /* controllers may cache some of the periodic schedule ... */
649         if (HCC_ISOC_CACHE(hcc_params))         // full frame cache
650                 ehci->i_thresh = 2 + 8;
651         else                                    // N microframes cached
652                 ehci->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
653
654         ehci->reclaim = NULL;
655         ehci->next_uframe = -1;
656         ehci->clock_frame = -1;
657
658         /*
659          * dedicate a qh for the async ring head, since we couldn't unlink
660          * a 'real' qh without stopping the async schedule [4.8].  use it
661          * as the 'reclamation list head' too.
662          * its dummy is used in hw_alt_next of many tds, to prevent the qh
663          * from automatically advancing to the next td after short reads.
664          */
665         ehci->async->qh_next.qh = NULL;
666         hw = ehci->async->hw;
667         hw->hw_next = QH_NEXT(ehci, ehci->async->qh_dma);
668         hw->hw_info1 = cpu_to_hc32(ehci, QH_HEAD);
669 #if defined(CONFIG_PPC_PS3)
670         hw->hw_info1 |= cpu_to_hc32(ehci, (1 << 7));    /* I = 1 */
671 #endif
672         hw->hw_token = cpu_to_hc32(ehci, QTD_STS_HALT);
673         hw->hw_qtd_next = EHCI_LIST_END(ehci);
674         ehci->async->qh_state = QH_STATE_LINKED;
675         hw->hw_alt_next = QTD_NEXT(ehci, ehci->async->dummy->qtd_dma);
676
677         /* clear interrupt enables, set irq latency */
678         if (log2_irq_thresh < 0 || log2_irq_thresh > 6)
679                 log2_irq_thresh = 0;
680         temp = 1 << (16 + log2_irq_thresh);
681         if (HCC_PER_PORT_CHANGE_EVENT(hcc_params)) {
682                 ehci->has_ppcd = 1;
683                 ehci_dbg(ehci, "enable per-port change event\n");
684                 temp |= CMD_PPCEE;
685         }
686         if (HCC_CANPARK(hcc_params)) {
687                 /* HW default park == 3, on hardware that supports it (like
688                  * NVidia and ALI silicon), maximizes throughput on the async
689                  * schedule by avoiding QH fetches between transfers.
690                  *
691                  * With fast usb storage devices and NForce2, "park" seems to
692                  * make problems:  throughput reduction (!), data errors...
693                  */
694                 if (park) {
695                         park = min(park, (unsigned) 3);
696                         temp |= CMD_PARK;
697                         temp |= park << 8;
698                 }
699                 ehci_dbg(ehci, "park %d\n", park);
700         }
701         if (HCC_PGM_FRAMELISTLEN(hcc_params)) {
702                 /* periodic schedule size can be smaller than default */
703                 temp &= ~(3 << 2);
704                 temp |= (EHCI_TUNE_FLS << 2);
705         }
706         if (HCC_LPM(hcc_params)) {
707                 /* support link power management EHCI 1.1 addendum */
708                 ehci_dbg(ehci, "support lpm\n");
709                 ehci->has_lpm = 1;
710                 if (hird > 0xf) {
711                         ehci_dbg(ehci, "hird %d invalid, use default 0",
712                         hird);
713                         hird = 0;
714                 }
715                 temp |= hird << 24;
716         }
717         ehci->command = temp;
718
719         /* Accept arbitrarily long scatter-gather lists */
720         if (!(hcd->driver->flags & HCD_LOCAL_MEM))
721                 hcd->self.sg_tablesize = ~0;
722         return 0;
723 }
724
725 /* start HC running; it's halted, ehci_init() has been run (once) */
726 static int ehci_run (struct usb_hcd *hcd)
727 {
728         struct ehci_hcd         *ehci = hcd_to_ehci (hcd);
729         u32                     temp;
730         u32                     hcc_params;
731
732         hcd->uses_new_polling = 1;
733
734         /* EHCI spec section 4.1 */
735
736         ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
737         ehci_writel(ehci, (u32)ehci->async->qh_dma, &ehci->regs->async_next);
738
739         /*
740          * hcc_params controls whether ehci->regs->segment must (!!!)
741          * be used; it constrains QH/ITD/SITD and QTD locations.
742          * pci_pool consistent memory always uses segment zero.
743          * streaming mappings for I/O buffers, like pci_map_single(),
744          * can return segments above 4GB, if the device allows.
745          *
746          * NOTE:  the dma mask is visible through dma_supported(), so
747          * drivers can pass this info along ... like NETIF_F_HIGHDMA,
748          * Scsi_Host.highmem_io, and so forth.  It's readonly to all
749          * host side drivers though.
750          */
751         hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params);
752         if (HCC_64BIT_ADDR(hcc_params)) {
753                 ehci_writel(ehci, 0, &ehci->regs->segment);
754 #if 0
755 // this is deeply broken on almost all architectures
756                 if (!dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64)))
757                         ehci_info(ehci, "enabled 64bit DMA\n");
758 #endif
759         }
760
761
762         // Philips, Intel, and maybe others need CMD_RUN before the
763         // root hub will detect new devices (why?); NEC doesn't
764         ehci->command &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET);
765         ehci->command |= CMD_RUN;
766         ehci_writel(ehci, ehci->command, &ehci->regs->command);
767         dbg_cmd (ehci, "init", ehci->command);
768
769         /*
770          * Start, enabling full USB 2.0 functionality ... usb 1.1 devices
771          * are explicitly handed to companion controller(s), so no TT is
772          * involved with the root hub.  (Except where one is integrated,
773          * and there's no companion controller unless maybe for USB OTG.)
774          *
775          * Turning on the CF flag will transfer ownership of all ports
776          * from the companions to the EHCI controller.  If any of the
777          * companions are in the middle of a port reset at the time, it
778          * could cause trouble.  Write-locking ehci_cf_port_reset_rwsem
779          * guarantees that no resets are in progress.  After we set CF,
780          * a short delay lets the hardware catch up; new resets shouldn't
781          * be started before the port switching actions could complete.
782          */
783         down_write(&ehci_cf_port_reset_rwsem);
784         ehci->rh_state = EHCI_RH_RUNNING;
785         ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
786         ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
787         msleep(5);
788         up_write(&ehci_cf_port_reset_rwsem);
789         ehci->last_periodic_enable = ktime_get_real();
790
791         temp = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
792         ehci_info (ehci,
793                 "USB %x.%x started, EHCI %x.%02x%s\n",
794                 ((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f),
795                 temp >> 8, temp & 0xff,
796                 ignore_oc ? ", overcurrent ignored" : "");
797
798         ehci_writel(ehci, INTR_MASK,
799                     &ehci->regs->intr_enable); /* Turn On Interrupts */
800
801         /* GRR this is run-once init(), being done every time the HC starts.
802          * So long as they're part of class devices, we can't do it init()
803          * since the class device isn't created that early.
804          */
805         create_debug_files(ehci);
806         create_sysfs_files(ehci);
807
808         return 0;
809 }
810
811 static int __maybe_unused ehci_setup (struct usb_hcd *hcd)
812 {
813         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
814         int retval;
815
816         ehci->regs = (void __iomem *)ehci->caps +
817             HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
818         dbg_hcs_params(ehci, "reset");
819         dbg_hcc_params(ehci, "reset");
820
821         /* cache this readonly data; minimize chip reads */
822         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
823
824         ehci->sbrn = HCD_USB2;
825
826         retval = ehci_halt(ehci);
827         if (retval)
828                 return retval;
829
830         /* data structure init */
831         retval = ehci_init(hcd);
832         if (retval)
833                 return retval;
834
835         ehci_reset(ehci);
836
837         return 0;
838 }
839
840 /*-------------------------------------------------------------------------*/
841
842 static irqreturn_t ehci_irq (struct usb_hcd *hcd)
843 {
844         struct ehci_hcd         *ehci = hcd_to_ehci (hcd);
845         u32                     status, masked_status, pcd_status = 0, cmd;
846         int                     bh;
847
848         spin_lock (&ehci->lock);
849
850         status = ehci_readl(ehci, &ehci->regs->status);
851
852         /* e.g. cardbus physical eject */
853         if (status == ~(u32) 0) {
854                 ehci_dbg (ehci, "device removed\n");
855                 goto dead;
856         }
857
858         /*
859          * We don't use STS_FLR, but some controllers don't like it to
860          * remain on, so mask it out along with the other status bits.
861          */
862         masked_status = status & (INTR_MASK | STS_FLR);
863
864         /* Shared IRQ? */
865         if (!masked_status || unlikely(ehci->rh_state == EHCI_RH_HALTED)) {
866                 spin_unlock(&ehci->lock);
867                 return IRQ_NONE;
868         }
869
870         /* clear (just) interrupts */
871         ehci_writel(ehci, masked_status, &ehci->regs->status);
872         cmd = ehci_readl(ehci, &ehci->regs->command);
873         bh = 0;
874
875 #ifdef  VERBOSE_DEBUG
876         /* unrequested/ignored: Frame List Rollover */
877         dbg_status (ehci, "irq", status);
878 #endif
879
880         /* INT, ERR, and IAA interrupt rates can be throttled */
881
882         /* normal [4.15.1.2] or error [4.15.1.1] completion */
883         if (likely ((status & (STS_INT|STS_ERR)) != 0)) {
884                 if (likely ((status & STS_ERR) == 0))
885                         COUNT (ehci->stats.normal);
886                 else
887                         COUNT (ehci->stats.error);
888                 bh = 1;
889         }
890
891         /* complete the unlinking of some qh [4.15.2.3] */
892         if (status & STS_IAA) {
893                 /* guard against (alleged) silicon errata */
894                 if (cmd & CMD_IAAD)
895                         ehci_dbg(ehci, "IAA with IAAD still set?\n");
896                 if (ehci->reclaim) {
897                         COUNT(ehci->stats.reclaim);
898                         end_unlink_async(ehci);
899                 } else
900                         ehci_dbg(ehci, "IAA with nothing to reclaim?\n");
901         }
902
903         /* remote wakeup [4.3.1] */
904         if (status & STS_PCD) {
905                 unsigned        i = HCS_N_PORTS (ehci->hcs_params);
906                 u32             ppcd = 0;
907
908                 /* kick root hub later */
909                 pcd_status = status;
910
911                 /* resume root hub? */
912                 if (ehci->rh_state == EHCI_RH_SUSPENDED)
913                         usb_hcd_resume_root_hub(hcd);
914
915                 /* get per-port change detect bits */
916                 if (ehci->has_ppcd)
917                         ppcd = status >> 16;
918
919                 while (i--) {
920                         int pstatus;
921
922                         /* leverage per-port change bits feature */
923                         if (ehci->has_ppcd && !(ppcd & (1 << i)))
924                                 continue;
925                         pstatus = ehci_readl(ehci,
926                                          &ehci->regs->port_status[i]);
927
928                         if (pstatus & PORT_OWNER)
929                                 continue;
930                         if (!(test_bit(i, &ehci->suspended_ports) &&
931                                         ((pstatus & PORT_RESUME) ||
932                                                 !(pstatus & PORT_SUSPEND)) &&
933                                         (pstatus & PORT_PE) &&
934                                         ehci->reset_done[i] == 0))
935                                 continue;
936
937                         /* start 20 msec resume signaling from this port,
938                          * and make khubd collect PORT_STAT_C_SUSPEND to
939                          * stop that signaling.  Use 5 ms extra for safety,
940                          * like usb_port_resume() does.
941                          */
942                         ehci->reset_done[i] = jiffies + msecs_to_jiffies(25);
943                         set_bit(i, &ehci->resuming_ports);
944                         ehci_dbg (ehci, "port %d remote wakeup\n", i + 1);
945                         mod_timer(&hcd->rh_timer, ehci->reset_done[i]);
946                 }
947         }
948
949         /* PCI errors [4.15.2.4] */
950         if (unlikely ((status & STS_FATAL) != 0)) {
951                 ehci_err(ehci, "fatal error\n");
952                 dbg_cmd(ehci, "fatal", cmd);
953                 dbg_status(ehci, "fatal", status);
954                 ehci_halt(ehci);
955 dead:
956                 ehci_reset(ehci);
957                 ehci_writel(ehci, 0, &ehci->regs->configured_flag);
958                 usb_hc_died(hcd);
959                 /* generic layer kills/unlinks all urbs, then
960                  * uses ehci_stop to clean up the rest
961                  */
962                 bh = 1;
963         }
964
965         if (bh)
966                 ehci_work (ehci);
967         spin_unlock (&ehci->lock);
968         if (pcd_status)
969                 usb_hcd_poll_rh_status(hcd);
970         return IRQ_HANDLED;
971 }
972
973 /*-------------------------------------------------------------------------*/
974
975 /*
976  * non-error returns are a promise to giveback() the urb later
977  * we drop ownership so next owner (or urb unlink) can get it
978  *
979  * urb + dev is in hcd.self.controller.urb_list
980  * we're queueing TDs onto software and hardware lists
981  *
982  * hcd-specific init for hcpriv hasn't been done yet
983  *
984  * NOTE:  control, bulk, and interrupt share the same code to append TDs
985  * to a (possibly active) QH, and the same QH scanning code.
986  */
987 static int ehci_urb_enqueue (
988         struct usb_hcd  *hcd,
989         struct urb      *urb,
990         gfp_t           mem_flags
991 ) {
992         struct ehci_hcd         *ehci = hcd_to_ehci (hcd);
993         struct list_head        qtd_list;
994
995         INIT_LIST_HEAD (&qtd_list);
996
997         switch (usb_pipetype (urb->pipe)) {
998         case PIPE_CONTROL:
999                 /* qh_completions() code doesn't handle all the fault cases
1000                  * in multi-TD control transfers.  Even 1KB is rare anyway.
1001                  */
1002                 if (urb->transfer_buffer_length > (16 * 1024))
1003                         return -EMSGSIZE;
1004                 /* FALLTHROUGH */
1005         /* case PIPE_BULK: */
1006         default:
1007                 if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags))
1008                         return -ENOMEM;
1009                 return submit_async(ehci, urb, &qtd_list, mem_flags);
1010
1011         case PIPE_INTERRUPT:
1012                 if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags))
1013                         return -ENOMEM;
1014                 return intr_submit(ehci, urb, &qtd_list, mem_flags);
1015
1016         case PIPE_ISOCHRONOUS:
1017                 if (urb->dev->speed == USB_SPEED_HIGH)
1018                         return itd_submit (ehci, urb, mem_flags);
1019                 else
1020                         return sitd_submit (ehci, urb, mem_flags);
1021         }
1022 }
1023
1024 static void unlink_async (struct ehci_hcd *ehci, struct ehci_qh *qh)
1025 {
1026         /* failfast */
1027         if (ehci->rh_state != EHCI_RH_RUNNING && ehci->reclaim)
1028                 end_unlink_async(ehci);
1029
1030         /* If the QH isn't linked then there's nothing we can do
1031          * unless we were called during a giveback, in which case
1032          * qh_completions() has to deal with it.
1033          */
1034         if (qh->qh_state != QH_STATE_LINKED) {
1035                 if (qh->qh_state == QH_STATE_COMPLETING)
1036                         qh->needs_rescan = 1;
1037                 return;
1038         }
1039
1040         /* defer till later if busy */
1041         if (ehci->reclaim) {
1042                 struct ehci_qh          *last;
1043
1044                 for (last = ehci->reclaim;
1045                                 last->reclaim;
1046                                 last = last->reclaim)
1047                         continue;
1048                 qh->qh_state = QH_STATE_UNLINK_WAIT;
1049                 last->reclaim = qh;
1050
1051         /* start IAA cycle */
1052         } else
1053                 start_unlink_async (ehci, qh);
1054 }
1055
1056 /* remove from hardware lists
1057  * completions normally happen asynchronously
1058  */
1059
1060 static int ehci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1061 {
1062         struct ehci_hcd         *ehci = hcd_to_ehci (hcd);
1063         struct ehci_qh          *qh;
1064         unsigned long           flags;
1065         int                     rc;
1066
1067         spin_lock_irqsave (&ehci->lock, flags);
1068         rc = usb_hcd_check_unlink_urb(hcd, urb, status);
1069         if (rc)
1070                 goto done;
1071
1072         switch (usb_pipetype (urb->pipe)) {
1073         // case PIPE_CONTROL:
1074         // case PIPE_BULK:
1075         default:
1076                 qh = (struct ehci_qh *) urb->hcpriv;
1077                 if (!qh)
1078                         break;
1079                 switch (qh->qh_state) {
1080                 case QH_STATE_LINKED:
1081                 case QH_STATE_COMPLETING:
1082                         unlink_async(ehci, qh);
1083                         break;
1084                 case QH_STATE_UNLINK:
1085                 case QH_STATE_UNLINK_WAIT:
1086                         /* already started */
1087                         break;
1088                 case QH_STATE_IDLE:
1089                         /* QH might be waiting for a Clear-TT-Buffer */
1090                         qh_completions(ehci, qh);
1091                         break;
1092                 }
1093                 break;
1094
1095         case PIPE_INTERRUPT:
1096                 qh = (struct ehci_qh *) urb->hcpriv;
1097                 if (!qh)
1098                         break;
1099                 switch (qh->qh_state) {
1100                 case QH_STATE_LINKED:
1101                 case QH_STATE_COMPLETING:
1102                         intr_deschedule (ehci, qh);
1103                         break;
1104                 case QH_STATE_IDLE:
1105                         qh_completions (ehci, qh);
1106                         break;
1107                 default:
1108                         ehci_dbg (ehci, "bogus qh %p state %d\n",
1109                                         qh, qh->qh_state);
1110                         goto done;
1111                 }
1112                 break;
1113
1114         case PIPE_ISOCHRONOUS:
1115                 // itd or sitd ...
1116
1117                 // wait till next completion, do it then.
1118                 // completion irqs can wait up to 1024 msec,
1119                 break;
1120         }
1121 done:
1122         spin_unlock_irqrestore (&ehci->lock, flags);
1123         return rc;
1124 }
1125
1126 /*-------------------------------------------------------------------------*/
1127
1128 // bulk qh holds the data toggle
1129
1130 static void
1131 ehci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep)
1132 {
1133         struct ehci_hcd         *ehci = hcd_to_ehci (hcd);
1134         unsigned long           flags;
1135         struct ehci_qh          *qh, *tmp;
1136
1137         /* ASSERT:  any requests/urbs are being unlinked */
1138         /* ASSERT:  nobody can be submitting urbs for this any more */
1139
1140 rescan:
1141         spin_lock_irqsave (&ehci->lock, flags);
1142         qh = ep->hcpriv;
1143         if (!qh)
1144                 goto done;
1145
1146         /* endpoints can be iso streams.  for now, we don't
1147          * accelerate iso completions ... so spin a while.
1148          */
1149         if (qh->hw == NULL) {
1150                 ehci_vdbg (ehci, "iso delay\n");
1151                 goto idle_timeout;
1152         }
1153
1154         if (ehci->rh_state != EHCI_RH_RUNNING)
1155                 qh->qh_state = QH_STATE_IDLE;
1156         switch (qh->qh_state) {
1157         case QH_STATE_LINKED:
1158         case QH_STATE_COMPLETING:
1159                 for (tmp = ehci->async->qh_next.qh;
1160                                 tmp && tmp != qh;
1161                                 tmp = tmp->qh_next.qh)
1162                         continue;
1163                 /* periodic qh self-unlinks on empty, and a COMPLETING qh
1164                  * may already be unlinked.
1165                  */
1166                 if (tmp)
1167                         unlink_async(ehci, qh);
1168                 /* FALL THROUGH */
1169         case QH_STATE_UNLINK:           /* wait for hw to finish? */
1170         case QH_STATE_UNLINK_WAIT:
1171 idle_timeout:
1172                 spin_unlock_irqrestore (&ehci->lock, flags);
1173                 schedule_timeout_uninterruptible(1);
1174                 goto rescan;
1175         case QH_STATE_IDLE:             /* fully unlinked */
1176                 if (qh->clearing_tt)
1177                         goto idle_timeout;
1178                 if (list_empty (&qh->qtd_list)) {
1179                         qh_put (qh);
1180                         break;
1181                 }
1182                 /* else FALL THROUGH */
1183         default:
1184                 /* caller was supposed to have unlinked any requests;
1185                  * that's not our job.  just leak this memory.
1186                  */
1187                 ehci_err (ehci, "qh %p (#%02x) state %d%s\n",
1188                         qh, ep->desc.bEndpointAddress, qh->qh_state,
1189                         list_empty (&qh->qtd_list) ? "" : "(has tds)");
1190                 break;
1191         }
1192         ep->hcpriv = NULL;
1193 done:
1194         spin_unlock_irqrestore (&ehci->lock, flags);
1195 }
1196
1197 static void
1198 ehci_endpoint_reset(struct usb_hcd *hcd, struct usb_host_endpoint *ep)
1199 {
1200         struct ehci_hcd         *ehci = hcd_to_ehci(hcd);
1201         struct ehci_qh          *qh;
1202         int                     eptype = usb_endpoint_type(&ep->desc);
1203         int                     epnum = usb_endpoint_num(&ep->desc);
1204         int                     is_out = usb_endpoint_dir_out(&ep->desc);
1205         unsigned long           flags;
1206
1207         if (eptype != USB_ENDPOINT_XFER_BULK && eptype != USB_ENDPOINT_XFER_INT)
1208                 return;
1209
1210         spin_lock_irqsave(&ehci->lock, flags);
1211         qh = ep->hcpriv;
1212
1213         /* For Bulk and Interrupt endpoints we maintain the toggle state
1214          * in the hardware; the toggle bits in udev aren't used at all.
1215          * When an endpoint is reset by usb_clear_halt() we must reset
1216          * the toggle bit in the QH.
1217          */
1218         if (qh) {
1219                 usb_settoggle(qh->dev, epnum, is_out, 0);
1220                 if (!list_empty(&qh->qtd_list)) {
1221                         WARN_ONCE(1, "clear_halt for a busy endpoint\n");
1222                 } else if (qh->qh_state == QH_STATE_LINKED ||
1223                                 qh->qh_state == QH_STATE_COMPLETING) {
1224
1225                         /* The toggle value in the QH can't be updated
1226                          * while the QH is active.  Unlink it now;
1227                          * re-linking will call qh_refresh().
1228                          */
1229                         if (eptype == USB_ENDPOINT_XFER_BULK)
1230                                 unlink_async(ehci, qh);
1231                         else
1232                                 intr_deschedule(ehci, qh);
1233                 }
1234         }
1235         spin_unlock_irqrestore(&ehci->lock, flags);
1236 }
1237
1238 static int ehci_get_frame (struct usb_hcd *hcd)
1239 {
1240         struct ehci_hcd         *ehci = hcd_to_ehci (hcd);
1241         return (ehci_read_frame_index(ehci) >> 3) % ehci->periodic_size;
1242 }
1243
1244 /*-------------------------------------------------------------------------*/
1245 /*
1246  * The EHCI in ChipIdea HDRC cannot be a separate module or device,
1247  * because its registers (and irq) are shared between host/gadget/otg
1248  * functions  and in order to facilitate role switching we cannot
1249  * give the ehci driver exclusive access to those.
1250  */
1251 #ifndef CHIPIDEA_EHCI
1252
1253 MODULE_DESCRIPTION(DRIVER_DESC);
1254 MODULE_AUTHOR (DRIVER_AUTHOR);
1255 MODULE_LICENSE ("GPL");
1256
1257 #ifdef CONFIG_PCI
1258 #include "ehci-pci.c"
1259 #define PCI_DRIVER              ehci_pci_driver
1260 #endif
1261
1262 #ifdef CONFIG_USB_EHCI_FSL
1263 #include "ehci-fsl.c"
1264 #define PLATFORM_DRIVER         ehci_fsl_driver
1265 #endif
1266
1267 #ifdef CONFIG_USB_EHCI_MXC
1268 #include "ehci-mxc.c"
1269 #define PLATFORM_DRIVER         ehci_mxc_driver
1270 #endif
1271
1272 #ifdef CONFIG_USB_EHCI_SH
1273 #include "ehci-sh.c"
1274 #define PLATFORM_DRIVER         ehci_hcd_sh_driver
1275 #endif
1276
1277 #ifdef CONFIG_MIPS_ALCHEMY
1278 #include "ehci-au1xxx.c"
1279 #define PLATFORM_DRIVER         ehci_hcd_au1xxx_driver
1280 #endif
1281
1282 #ifdef CONFIG_USB_EHCI_HCD_OMAP
1283 #include "ehci-omap.c"
1284 #define        PLATFORM_DRIVER         ehci_hcd_omap_driver
1285 #endif
1286
1287 #ifdef CONFIG_PPC_PS3
1288 #include "ehci-ps3.c"
1289 #define PS3_SYSTEM_BUS_DRIVER   ps3_ehci_driver
1290 #endif
1291
1292 #ifdef CONFIG_USB_EHCI_HCD_PPC_OF
1293 #include "ehci-ppc-of.c"
1294 #define OF_PLATFORM_DRIVER      ehci_hcd_ppc_of_driver
1295 #endif
1296
1297 #ifdef CONFIG_XPS_USB_HCD_XILINX
1298 #include "ehci-xilinx-of.c"
1299 #define XILINX_OF_PLATFORM_DRIVER       ehci_hcd_xilinx_of_driver
1300 #endif
1301
1302 #ifdef CONFIG_PLAT_ORION
1303 #include "ehci-orion.c"
1304 #define PLATFORM_DRIVER         ehci_orion_driver
1305 #endif
1306
1307 #ifdef CONFIG_ARCH_IXP4XX
1308 #include "ehci-ixp4xx.c"
1309 #define PLATFORM_DRIVER         ixp4xx_ehci_driver
1310 #endif
1311
1312 #ifdef CONFIG_USB_W90X900_EHCI
1313 #include "ehci-w90x900.c"
1314 #define PLATFORM_DRIVER         ehci_hcd_w90x900_driver
1315 #endif
1316
1317 #ifdef CONFIG_ARCH_AT91
1318 #include "ehci-atmel.c"
1319 #define PLATFORM_DRIVER         ehci_atmel_driver
1320 #endif
1321
1322 #ifdef CONFIG_USB_OCTEON_EHCI
1323 #include "ehci-octeon.c"
1324 #define PLATFORM_DRIVER         ehci_octeon_driver
1325 #endif
1326
1327 #ifdef CONFIG_USB_CNS3XXX_EHCI
1328 #include "ehci-cns3xxx.c"
1329 #define PLATFORM_DRIVER         cns3xxx_ehci_driver
1330 #endif
1331
1332 #ifdef CONFIG_ARCH_VT8500
1333 #include "ehci-vt8500.c"
1334 #define PLATFORM_DRIVER         vt8500_ehci_driver
1335 #endif
1336
1337 #ifdef CONFIG_PLAT_SPEAR
1338 #include "ehci-spear.c"
1339 #define PLATFORM_DRIVER         spear_ehci_hcd_driver
1340 #endif
1341
1342 #ifdef CONFIG_USB_EHCI_MSM
1343 #include "ehci-msm.c"
1344 #define PLATFORM_DRIVER         ehci_msm_driver
1345 #endif
1346
1347 #ifdef CONFIG_USB_EHCI_HCD_PMC_MSP
1348 #include "ehci-pmcmsp.c"
1349 #define PLATFORM_DRIVER         ehci_hcd_msp_driver
1350 #endif
1351
1352 #ifdef CONFIG_USB_EHCI_TEGRA
1353 #include "ehci-tegra.c"
1354 #define PLATFORM_DRIVER         tegra_ehci_driver
1355 #endif
1356
1357 #ifdef CONFIG_USB_EHCI_S5P
1358 #include "ehci-s5p.c"
1359 #define PLATFORM_DRIVER         s5p_ehci_driver
1360 #endif
1361
1362 #ifdef CONFIG_SPARC_LEON
1363 #include "ehci-grlib.c"
1364 #define PLATFORM_DRIVER         ehci_grlib_driver
1365 #endif
1366
1367 #ifdef CONFIG_CPU_XLR
1368 #include "ehci-xls.c"
1369 #define PLATFORM_DRIVER         ehci_xls_driver
1370 #endif
1371
1372 #ifdef CONFIG_USB_EHCI_MV
1373 #include "ehci-mv.c"
1374 #define        PLATFORM_DRIVER         ehci_mv_driver
1375 #endif
1376
1377 #ifdef CONFIG_MACH_LOONGSON1
1378 #include "ehci-ls1x.c"
1379 #define PLATFORM_DRIVER         ehci_ls1x_driver
1380 #endif
1381
1382 #ifdef CONFIG_MIPS_SEAD3
1383 #include "ehci-sead3.c"
1384 #define PLATFORM_DRIVER         ehci_hcd_sead3_driver
1385 #endif
1386
1387 #ifdef CONFIG_USB_EHCI_HCD_PLATFORM
1388 #include "ehci-platform.c"
1389 #define PLATFORM_DRIVER         ehci_platform_driver
1390 #endif
1391
1392 #if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
1393     !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
1394     !defined(XILINX_OF_PLATFORM_DRIVER)
1395 #error "missing bus glue for ehci-hcd"
1396 #endif
1397
1398 static int __init ehci_hcd_init(void)
1399 {
1400         int retval = 0;
1401
1402         if (usb_disabled())
1403                 return -ENODEV;
1404
1405         printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name);
1406         set_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
1407         if (test_bit(USB_UHCI_LOADED, &usb_hcds_loaded) ||
1408                         test_bit(USB_OHCI_LOADED, &usb_hcds_loaded))
1409                 printk(KERN_WARNING "Warning! ehci_hcd should always be loaded"
1410                                 " before uhci_hcd and ohci_hcd, not after\n");
1411
1412         pr_debug("%s: block sizes: qh %Zd qtd %Zd itd %Zd sitd %Zd\n",
1413                  hcd_name,
1414                  sizeof(struct ehci_qh), sizeof(struct ehci_qtd),
1415                  sizeof(struct ehci_itd), sizeof(struct ehci_sitd));
1416
1417 #ifdef DEBUG
1418         ehci_debug_root = debugfs_create_dir("ehci", usb_debug_root);
1419         if (!ehci_debug_root) {
1420                 retval = -ENOENT;
1421                 goto err_debug;
1422         }
1423 #endif
1424
1425 #ifdef PLATFORM_DRIVER
1426         retval = platform_driver_register(&PLATFORM_DRIVER);
1427         if (retval < 0)
1428                 goto clean0;
1429 #endif
1430
1431 #ifdef PCI_DRIVER
1432         retval = pci_register_driver(&PCI_DRIVER);
1433         if (retval < 0)
1434                 goto clean1;
1435 #endif
1436
1437 #ifdef PS3_SYSTEM_BUS_DRIVER
1438         retval = ps3_ehci_driver_register(&PS3_SYSTEM_BUS_DRIVER);
1439         if (retval < 0)
1440                 goto clean2;
1441 #endif
1442
1443 #ifdef OF_PLATFORM_DRIVER
1444         retval = platform_driver_register(&OF_PLATFORM_DRIVER);
1445         if (retval < 0)
1446                 goto clean3;
1447 #endif
1448
1449 #ifdef XILINX_OF_PLATFORM_DRIVER
1450         retval = platform_driver_register(&XILINX_OF_PLATFORM_DRIVER);
1451         if (retval < 0)
1452                 goto clean4;
1453 #endif
1454         return retval;
1455
1456 #ifdef XILINX_OF_PLATFORM_DRIVER
1457         /* platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER); */
1458 clean4:
1459 #endif
1460 #ifdef OF_PLATFORM_DRIVER
1461         platform_driver_unregister(&OF_PLATFORM_DRIVER);
1462 clean3:
1463 #endif
1464 #ifdef PS3_SYSTEM_BUS_DRIVER
1465         ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1466 clean2:
1467 #endif
1468 #ifdef PCI_DRIVER
1469         pci_unregister_driver(&PCI_DRIVER);
1470 clean1:
1471 #endif
1472 #ifdef PLATFORM_DRIVER
1473         platform_driver_unregister(&PLATFORM_DRIVER);
1474 clean0:
1475 #endif
1476 #ifdef DEBUG
1477         debugfs_remove(ehci_debug_root);
1478         ehci_debug_root = NULL;
1479 err_debug:
1480 #endif
1481         clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
1482         return retval;
1483 }
1484 module_init(ehci_hcd_init);
1485
1486 static void __exit ehci_hcd_cleanup(void)
1487 {
1488 #ifdef XILINX_OF_PLATFORM_DRIVER
1489         platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER);
1490 #endif
1491 #ifdef OF_PLATFORM_DRIVER
1492         platform_driver_unregister(&OF_PLATFORM_DRIVER);
1493 #endif
1494 #ifdef PLATFORM_DRIVER
1495         platform_driver_unregister(&PLATFORM_DRIVER);
1496 #endif
1497 #ifdef PCI_DRIVER
1498         pci_unregister_driver(&PCI_DRIVER);
1499 #endif
1500 #ifdef PS3_SYSTEM_BUS_DRIVER
1501         ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1502 #endif
1503 #ifdef DEBUG
1504         debugfs_remove(ehci_debug_root);
1505 #endif
1506         clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
1507 }
1508 module_exit(ehci_hcd_cleanup);
1509
1510 #endif /* CHIPIDEA_EHCI */