]> git.kernelconcepts.de Git - karo-tx-linux.git/blob - drivers/usb/host/ehci-hcd.c
5cb775b1802d7aade70fe706cb384a225b1a1d10
[karo-tx-linux.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 __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->command = ehci_readl(ehci, &ehci->regs->command);
356         ehci->port_c_suspend = ehci->suspended_ports =
357                         ehci->resuming_ports = 0;
358         return retval;
359 }
360
361 /* idle the controller (from running) */
362 static void ehci_quiesce (struct ehci_hcd *ehci)
363 {
364         u32     temp;
365
366 #ifdef DEBUG
367         if (ehci->rh_state != EHCI_RH_RUNNING)
368                 BUG ();
369 #endif
370
371         /* wait for any schedule enables/disables to take effect */
372         temp = (ehci->command << 10) & (STS_ASS | STS_PSS);
373         if (handshake_on_error_set_halt(ehci, &ehci->regs->status,
374                                         STS_ASS | STS_PSS, temp, 16 * 125))
375                 return;
376
377         /* then disable anything that's still active */
378         ehci->command &= ~(CMD_ASE | CMD_PSE);
379         ehci_writel(ehci, ehci->command, &ehci->regs->command);
380
381         /* hardware can take 16 microframes to turn off ... */
382         handshake_on_error_set_halt(ehci, &ehci->regs->status,
383                                     STS_ASS | STS_PSS, 0, 16 * 125);
384 }
385
386 /*-------------------------------------------------------------------------*/
387
388 static void end_unlink_async(struct ehci_hcd *ehci);
389 static void ehci_work(struct ehci_hcd *ehci);
390
391 #include "ehci-hub.c"
392 #include "ehci-lpm.c"
393 #include "ehci-mem.c"
394 #include "ehci-q.c"
395 #include "ehci-sched.c"
396 #include "ehci-sysfs.c"
397
398 /*-------------------------------------------------------------------------*/
399
400 static void ehci_iaa_watchdog(unsigned long param)
401 {
402         struct ehci_hcd         *ehci = (struct ehci_hcd *) param;
403         unsigned long           flags;
404
405         spin_lock_irqsave (&ehci->lock, flags);
406
407         /* Lost IAA irqs wedge things badly; seen first with a vt8235.
408          * So we need this watchdog, but must protect it against both
409          * (a) SMP races against real IAA firing and retriggering, and
410          * (b) clean HC shutdown, when IAA watchdog was pending.
411          */
412         if (ehci->reclaim
413                         && !timer_pending(&ehci->iaa_watchdog)
414                         && ehci->rh_state == EHCI_RH_RUNNING) {
415                 u32 cmd, status;
416
417                 /* If we get here, IAA is *REALLY* late.  It's barely
418                  * conceivable that the system is so busy that CMD_IAAD
419                  * is still legitimately set, so let's be sure it's
420                  * clear before we read STS_IAA.  (The HC should clear
421                  * CMD_IAAD when it sets STS_IAA.)
422                  */
423                 cmd = ehci_readl(ehci, &ehci->regs->command);
424
425                 /* If IAA is set here it either legitimately triggered
426                  * before we cleared IAAD above (but _way_ late, so we'll
427                  * still count it as lost) ... or a silicon erratum:
428                  * - VIA seems to set IAA without triggering the IRQ;
429                  * - IAAD potentially cleared without setting IAA.
430                  */
431                 status = ehci_readl(ehci, &ehci->regs->status);
432                 if ((status & STS_IAA) || !(cmd & CMD_IAAD)) {
433                         COUNT (ehci->stats.lost_iaa);
434                         ehci_writel(ehci, STS_IAA, &ehci->regs->status);
435                 }
436
437                 ehci_vdbg(ehci, "IAA watchdog: status %x cmd %x\n",
438                                 status, cmd);
439                 end_unlink_async(ehci);
440         }
441
442         spin_unlock_irqrestore(&ehci->lock, flags);
443 }
444
445 static void ehci_watchdog(unsigned long param)
446 {
447         struct ehci_hcd         *ehci = (struct ehci_hcd *) param;
448         unsigned long           flags;
449
450         spin_lock_irqsave(&ehci->lock, flags);
451
452         /* stop async processing after it's idled a bit */
453         if (test_bit (TIMER_ASYNC_OFF, &ehci->actions))
454                 start_unlink_async (ehci, ehci->async);
455
456         /* ehci could run by timer, without IRQs ... */
457         ehci_work (ehci);
458
459         spin_unlock_irqrestore (&ehci->lock, flags);
460 }
461
462 /* On some systems, leaving remote wakeup enabled prevents system shutdown.
463  * The firmware seems to think that powering off is a wakeup event!
464  * This routine turns off remote wakeup and everything else, on all ports.
465  */
466 static void ehci_turn_off_all_ports(struct ehci_hcd *ehci)
467 {
468         int     port = HCS_N_PORTS(ehci->hcs_params);
469
470         while (port--)
471                 ehci_writel(ehci, PORT_RWC_BITS,
472                                 &ehci->regs->port_status[port]);
473 }
474
475 /*
476  * Halt HC, turn off all ports, and let the BIOS use the companion controllers.
477  * Should be called with ehci->lock held.
478  */
479 static void ehci_silence_controller(struct ehci_hcd *ehci)
480 {
481         ehci_halt(ehci);
482         ehci_turn_off_all_ports(ehci);
483
484         /* make BIOS/etc use companion controller during reboot */
485         ehci_writel(ehci, 0, &ehci->regs->configured_flag);
486
487         /* unblock posted writes */
488         ehci_readl(ehci, &ehci->regs->configured_flag);
489 }
490
491 /* ehci_shutdown kick in for silicon on any bus (not just pci, etc).
492  * This forcibly disables dma and IRQs, helping kexec and other cases
493  * where the next system software may expect clean state.
494  */
495 static void ehci_shutdown(struct usb_hcd *hcd)
496 {
497         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
498
499         del_timer_sync(&ehci->watchdog);
500         del_timer_sync(&ehci->iaa_watchdog);
501
502         spin_lock_irq(&ehci->lock);
503         ehci_silence_controller(ehci);
504         spin_unlock_irq(&ehci->lock);
505 }
506
507 static void ehci_port_power (struct ehci_hcd *ehci, int is_on)
508 {
509         unsigned port;
510
511         if (!HCS_PPC (ehci->hcs_params))
512                 return;
513
514         ehci_dbg (ehci, "...power%s ports...\n", is_on ? "up" : "down");
515         for (port = HCS_N_PORTS (ehci->hcs_params); port > 0; )
516                 (void) ehci_hub_control(ehci_to_hcd(ehci),
517                                 is_on ? SetPortFeature : ClearPortFeature,
518                                 USB_PORT_FEAT_POWER,
519                                 port--, NULL, 0);
520         /* Flush those writes */
521         ehci_readl(ehci, &ehci->regs->command);
522         msleep(20);
523 }
524
525 /*-------------------------------------------------------------------------*/
526
527 /*
528  * ehci_work is called from some interrupts, timers, and so on.
529  * it calls driver completion functions, after dropping ehci->lock.
530  */
531 static void ehci_work (struct ehci_hcd *ehci)
532 {
533         timer_action_done (ehci, TIMER_IO_WATCHDOG);
534
535         /* another CPU may drop ehci->lock during a schedule scan while
536          * it reports urb completions.  this flag guards against bogus
537          * attempts at re-entrant schedule scanning.
538          */
539         if (ehci->scanning)
540                 return;
541         ehci->scanning = 1;
542         scan_async (ehci);
543         if (ehci->next_uframe != -1)
544                 scan_periodic (ehci);
545         ehci->scanning = 0;
546
547         /* the IO watchdog guards against hardware or driver bugs that
548          * misplace IRQs, and should let us run completely without IRQs.
549          * such lossage has been observed on both VT6202 and VT8235.
550          */
551         if (ehci->rh_state == EHCI_RH_RUNNING &&
552                         (ehci->async->qh_next.ptr != NULL ||
553                          ehci->periodic_sched != 0))
554                 timer_action (ehci, TIMER_IO_WATCHDOG);
555 }
556
557 /*
558  * Called when the ehci_hcd module is removed.
559  */
560 static void ehci_stop (struct usb_hcd *hcd)
561 {
562         struct ehci_hcd         *ehci = hcd_to_ehci (hcd);
563
564         ehci_dbg (ehci, "stop\n");
565
566         /* no more interrupts ... */
567         del_timer_sync (&ehci->watchdog);
568         del_timer_sync(&ehci->iaa_watchdog);
569
570         spin_lock_irq(&ehci->lock);
571         if (ehci->rh_state == EHCI_RH_RUNNING)
572                 ehci_quiesce (ehci);
573
574         ehci_silence_controller(ehci);
575         ehci_reset (ehci);
576         spin_unlock_irq(&ehci->lock);
577
578         remove_sysfs_files(ehci);
579         remove_debug_files (ehci);
580
581         /* root hub is shut down separately (first, when possible) */
582         spin_lock_irq (&ehci->lock);
583         if (ehci->async)
584                 ehci_work (ehci);
585         spin_unlock_irq (&ehci->lock);
586         ehci_mem_cleanup (ehci);
587
588         if (ehci->amd_pll_fix == 1)
589                 usb_amd_dev_put();
590
591 #ifdef  EHCI_STATS
592         ehci_dbg (ehci, "irq normal %ld err %ld reclaim %ld (lost %ld)\n",
593                 ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim,
594                 ehci->stats.lost_iaa);
595         ehci_dbg (ehci, "complete %ld unlink %ld\n",
596                 ehci->stats.complete, ehci->stats.unlink);
597 #endif
598
599         dbg_status (ehci, "ehci_stop completed",
600                     ehci_readl(ehci, &ehci->regs->status));
601 }
602
603 /* one-time init, only for memory state */
604 static int ehci_init(struct usb_hcd *hcd)
605 {
606         struct ehci_hcd         *ehci = hcd_to_ehci(hcd);
607         u32                     temp;
608         int                     retval;
609         u32                     hcc_params;
610         struct ehci_qh_hw       *hw;
611
612         spin_lock_init(&ehci->lock);
613
614         /*
615          * keep io watchdog by default, those good HCDs could turn off it later
616          */
617         ehci->need_io_watchdog = 1;
618         init_timer(&ehci->watchdog);
619         ehci->watchdog.function = ehci_watchdog;
620         ehci->watchdog.data = (unsigned long) ehci;
621
622         init_timer(&ehci->iaa_watchdog);
623         ehci->iaa_watchdog.function = ehci_iaa_watchdog;
624         ehci->iaa_watchdog.data = (unsigned long) ehci;
625
626         hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params);
627
628         /*
629          * by default set standard 80% (== 100 usec/uframe) max periodic
630          * bandwidth as required by USB 2.0
631          */
632         ehci->uframe_periodic_max = 100;
633
634         /*
635          * hw default: 1K periodic list heads, one per frame.
636          * periodic_size can shrink by USBCMD update if hcc_params allows.
637          */
638         ehci->periodic_size = DEFAULT_I_TDPS;
639         INIT_LIST_HEAD(&ehci->cached_itd_list);
640         INIT_LIST_HEAD(&ehci->cached_sitd_list);
641
642         if (HCC_PGM_FRAMELISTLEN(hcc_params)) {
643                 /* periodic schedule size can be smaller than default */
644                 switch (EHCI_TUNE_FLS) {
645                 case 0: ehci->periodic_size = 1024; break;
646                 case 1: ehci->periodic_size = 512; break;
647                 case 2: ehci->periodic_size = 256; break;
648                 default:        BUG();
649                 }
650         }
651         if ((retval = ehci_mem_init(ehci, GFP_KERNEL)) < 0)
652                 return retval;
653
654         /* controllers may cache some of the periodic schedule ... */
655         if (HCC_ISOC_CACHE(hcc_params))         // full frame cache
656                 ehci->i_thresh = 2 + 8;
657         else                                    // N microframes cached
658                 ehci->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
659
660         ehci->reclaim = NULL;
661         ehci->next_uframe = -1;
662         ehci->clock_frame = -1;
663
664         /*
665          * dedicate a qh for the async ring head, since we couldn't unlink
666          * a 'real' qh without stopping the async schedule [4.8].  use it
667          * as the 'reclamation list head' too.
668          * its dummy is used in hw_alt_next of many tds, to prevent the qh
669          * from automatically advancing to the next td after short reads.
670          */
671         ehci->async->qh_next.qh = NULL;
672         hw = ehci->async->hw;
673         hw->hw_next = QH_NEXT(ehci, ehci->async->qh_dma);
674         hw->hw_info1 = cpu_to_hc32(ehci, QH_HEAD);
675         hw->hw_info1 |= cpu_to_hc32(ehci, (1 << 7));    /* I = 1 */
676         hw->hw_token = cpu_to_hc32(ehci, QTD_STS_HALT);
677         hw->hw_qtd_next = EHCI_LIST_END(ehci);
678         ehci->async->qh_state = QH_STATE_LINKED;
679         hw->hw_alt_next = QTD_NEXT(ehci, ehci->async->dummy->qtd_dma);
680
681         /* clear interrupt enables, set irq latency */
682         if (log2_irq_thresh < 0 || log2_irq_thresh > 6)
683                 log2_irq_thresh = 0;
684         temp = 1 << (16 + log2_irq_thresh);
685         if (HCC_PER_PORT_CHANGE_EVENT(hcc_params)) {
686                 ehci->has_ppcd = 1;
687                 ehci_dbg(ehci, "enable per-port change event\n");
688                 temp |= CMD_PPCEE;
689         }
690         if (HCC_CANPARK(hcc_params)) {
691                 /* HW default park == 3, on hardware that supports it (like
692                  * NVidia and ALI silicon), maximizes throughput on the async
693                  * schedule by avoiding QH fetches between transfers.
694                  *
695                  * With fast usb storage devices and NForce2, "park" seems to
696                  * make problems:  throughput reduction (!), data errors...
697                  */
698                 if (park) {
699                         park = min(park, (unsigned) 3);
700                         temp |= CMD_PARK;
701                         temp |= park << 8;
702                 }
703                 ehci_dbg(ehci, "park %d\n", park);
704         }
705         if (HCC_PGM_FRAMELISTLEN(hcc_params)) {
706                 /* periodic schedule size can be smaller than default */
707                 temp &= ~(3 << 2);
708                 temp |= (EHCI_TUNE_FLS << 2);
709         }
710         if (HCC_LPM(hcc_params)) {
711                 /* support link power management EHCI 1.1 addendum */
712                 ehci_dbg(ehci, "support lpm\n");
713                 ehci->has_lpm = 1;
714                 if (hird > 0xf) {
715                         ehci_dbg(ehci, "hird %d invalid, use default 0",
716                         hird);
717                         hird = 0;
718                 }
719                 temp |= hird << 24;
720         }
721         ehci->command = temp;
722
723         /* Accept arbitrarily long scatter-gather lists */
724         if (!(hcd->driver->flags & HCD_LOCAL_MEM))
725                 hcd->self.sg_tablesize = ~0;
726         return 0;
727 }
728
729 /* start HC running; it's halted, ehci_init() has been run (once) */
730 static int ehci_run (struct usb_hcd *hcd)
731 {
732         struct ehci_hcd         *ehci = hcd_to_ehci (hcd);
733         u32                     temp;
734         u32                     hcc_params;
735
736         hcd->uses_new_polling = 1;
737
738         /* EHCI spec section 4.1 */
739
740         ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
741         ehci_writel(ehci, (u32)ehci->async->qh_dma, &ehci->regs->async_next);
742
743         /*
744          * hcc_params controls whether ehci->regs->segment must (!!!)
745          * be used; it constrains QH/ITD/SITD and QTD locations.
746          * pci_pool consistent memory always uses segment zero.
747          * streaming mappings for I/O buffers, like pci_map_single(),
748          * can return segments above 4GB, if the device allows.
749          *
750          * NOTE:  the dma mask is visible through dma_supported(), so
751          * drivers can pass this info along ... like NETIF_F_HIGHDMA,
752          * Scsi_Host.highmem_io, and so forth.  It's readonly to all
753          * host side drivers though.
754          */
755         hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params);
756         if (HCC_64BIT_ADDR(hcc_params)) {
757                 ehci_writel(ehci, 0, &ehci->regs->segment);
758 #if 0
759 // this is deeply broken on almost all architectures
760                 if (!dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64)))
761                         ehci_info(ehci, "enabled 64bit DMA\n");
762 #endif
763         }
764
765
766         // Philips, Intel, and maybe others need CMD_RUN before the
767         // root hub will detect new devices (why?); NEC doesn't
768         ehci->command &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET);
769         ehci->command |= CMD_RUN;
770         ehci_writel(ehci, ehci->command, &ehci->regs->command);
771         dbg_cmd (ehci, "init", ehci->command);
772
773         /*
774          * Start, enabling full USB 2.0 functionality ... usb 1.1 devices
775          * are explicitly handed to companion controller(s), so no TT is
776          * involved with the root hub.  (Except where one is integrated,
777          * and there's no companion controller unless maybe for USB OTG.)
778          *
779          * Turning on the CF flag will transfer ownership of all ports
780          * from the companions to the EHCI controller.  If any of the
781          * companions are in the middle of a port reset at the time, it
782          * could cause trouble.  Write-locking ehci_cf_port_reset_rwsem
783          * guarantees that no resets are in progress.  After we set CF,
784          * a short delay lets the hardware catch up; new resets shouldn't
785          * be started before the port switching actions could complete.
786          */
787         down_write(&ehci_cf_port_reset_rwsem);
788         ehci->rh_state = EHCI_RH_RUNNING;
789         ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
790         ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
791         msleep(5);
792         up_write(&ehci_cf_port_reset_rwsem);
793         ehci->last_periodic_enable = ktime_get_real();
794
795         temp = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
796         ehci_info (ehci,
797                 "USB %x.%x started, EHCI %x.%02x%s\n",
798                 ((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f),
799                 temp >> 8, temp & 0xff,
800                 ignore_oc ? ", overcurrent ignored" : "");
801
802         ehci_writel(ehci, INTR_MASK,
803                     &ehci->regs->intr_enable); /* Turn On Interrupts */
804
805         /* GRR this is run-once init(), being done every time the HC starts.
806          * So long as they're part of class devices, we can't do it init()
807          * since the class device isn't created that early.
808          */
809         create_debug_files(ehci);
810         create_sysfs_files(ehci);
811
812         return 0;
813 }
814
815 static int __maybe_unused ehci_setup (struct usb_hcd *hcd)
816 {
817         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
818         int retval;
819
820         ehci->regs = (void __iomem *)ehci->caps +
821             HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
822         dbg_hcs_params(ehci, "reset");
823         dbg_hcc_params(ehci, "reset");
824
825         /* cache this readonly data; minimize chip reads */
826         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
827
828         ehci->sbrn = HCD_USB2;
829
830         retval = ehci_halt(ehci);
831         if (retval)
832                 return retval;
833
834         /* data structure init */
835         retval = ehci_init(hcd);
836         if (retval)
837                 return retval;
838
839         ehci_reset(ehci);
840
841         return 0;
842 }
843
844 /*-------------------------------------------------------------------------*/
845
846 static irqreturn_t ehci_irq (struct usb_hcd *hcd)
847 {
848         struct ehci_hcd         *ehci = hcd_to_ehci (hcd);
849         u32                     status, masked_status, pcd_status = 0, cmd;
850         int                     bh;
851
852         spin_lock (&ehci->lock);
853
854         status = ehci_readl(ehci, &ehci->regs->status);
855
856         /* e.g. cardbus physical eject */
857         if (status == ~(u32) 0) {
858                 ehci_dbg (ehci, "device removed\n");
859                 goto dead;
860         }
861
862         /*
863          * We don't use STS_FLR, but some controllers don't like it to
864          * remain on, so mask it out along with the other status bits.
865          */
866         masked_status = status & (INTR_MASK | STS_FLR);
867
868         /* Shared IRQ? */
869         if (!masked_status || unlikely(ehci->rh_state == EHCI_RH_HALTED)) {
870                 spin_unlock(&ehci->lock);
871                 return IRQ_NONE;
872         }
873
874         /* clear (just) interrupts */
875         ehci_writel(ehci, masked_status, &ehci->regs->status);
876         cmd = ehci_readl(ehci, &ehci->regs->command);
877         bh = 0;
878
879 #ifdef  VERBOSE_DEBUG
880         /* unrequested/ignored: Frame List Rollover */
881         dbg_status (ehci, "irq", status);
882 #endif
883
884         /* INT, ERR, and IAA interrupt rates can be throttled */
885
886         /* normal [4.15.1.2] or error [4.15.1.1] completion */
887         if (likely ((status & (STS_INT|STS_ERR)) != 0)) {
888                 if (likely ((status & STS_ERR) == 0))
889                         COUNT (ehci->stats.normal);
890                 else
891                         COUNT (ehci->stats.error);
892                 bh = 1;
893         }
894
895         /* complete the unlinking of some qh [4.15.2.3] */
896         if (status & STS_IAA) {
897                 /* guard against (alleged) silicon errata */
898                 if (cmd & CMD_IAAD)
899                         ehci_dbg(ehci, "IAA with IAAD still set?\n");
900                 if (ehci->reclaim) {
901                         COUNT(ehci->stats.reclaim);
902                         end_unlink_async(ehci);
903                 } else
904                         ehci_dbg(ehci, "IAA with nothing to reclaim?\n");
905         }
906
907         /* remote wakeup [4.3.1] */
908         if (status & STS_PCD) {
909                 unsigned        i = HCS_N_PORTS (ehci->hcs_params);
910                 u32             ppcd = 0;
911
912                 /* kick root hub later */
913                 pcd_status = status;
914
915                 /* resume root hub? */
916                 if (ehci->rh_state == EHCI_RH_SUSPENDED)
917                         usb_hcd_resume_root_hub(hcd);
918
919                 /* get per-port change detect bits */
920                 if (ehci->has_ppcd)
921                         ppcd = status >> 16;
922
923                 while (i--) {
924                         int pstatus;
925
926                         /* leverage per-port change bits feature */
927                         if (ehci->has_ppcd && !(ppcd & (1 << i)))
928                                 continue;
929                         pstatus = ehci_readl(ehci,
930                                          &ehci->regs->port_status[i]);
931
932                         if (pstatus & PORT_OWNER)
933                                 continue;
934                         if (!(test_bit(i, &ehci->suspended_ports) &&
935                                         ((pstatus & PORT_RESUME) ||
936                                                 !(pstatus & PORT_SUSPEND)) &&
937                                         (pstatus & PORT_PE) &&
938                                         ehci->reset_done[i] == 0))
939                                 continue;
940
941                         /* start 20 msec resume signaling from this port,
942                          * and make khubd collect PORT_STAT_C_SUSPEND to
943                          * stop that signaling.  Use 5 ms extra for safety,
944                          * like usb_port_resume() does.
945                          */
946                         ehci->reset_done[i] = jiffies + msecs_to_jiffies(25);
947                         set_bit(i, &ehci->resuming_ports);
948                         ehci_dbg (ehci, "port %d remote wakeup\n", i + 1);
949                         mod_timer(&hcd->rh_timer, ehci->reset_done[i]);
950                 }
951         }
952
953         /* PCI errors [4.15.2.4] */
954         if (unlikely ((status & STS_FATAL) != 0)) {
955                 ehci_err(ehci, "fatal error\n");
956                 dbg_cmd(ehci, "fatal", cmd);
957                 dbg_status(ehci, "fatal", status);
958                 ehci_halt(ehci);
959 dead:
960                 ehci_reset(ehci);
961                 ehci_writel(ehci, 0, &ehci->regs->configured_flag);
962                 usb_hc_died(hcd);
963                 /* generic layer kills/unlinks all urbs, then
964                  * uses ehci_stop to clean up the rest
965                  */
966                 bh = 1;
967         }
968
969         if (bh)
970                 ehci_work (ehci);
971         spin_unlock (&ehci->lock);
972         if (pcd_status)
973                 usb_hcd_poll_rh_status(hcd);
974         return IRQ_HANDLED;
975 }
976
977 /*-------------------------------------------------------------------------*/
978
979 /*
980  * non-error returns are a promise to giveback() the urb later
981  * we drop ownership so next owner (or urb unlink) can get it
982  *
983  * urb + dev is in hcd.self.controller.urb_list
984  * we're queueing TDs onto software and hardware lists
985  *
986  * hcd-specific init for hcpriv hasn't been done yet
987  *
988  * NOTE:  control, bulk, and interrupt share the same code to append TDs
989  * to a (possibly active) QH, and the same QH scanning code.
990  */
991 static int ehci_urb_enqueue (
992         struct usb_hcd  *hcd,
993         struct urb      *urb,
994         gfp_t           mem_flags
995 ) {
996         struct ehci_hcd         *ehci = hcd_to_ehci (hcd);
997         struct list_head        qtd_list;
998
999         INIT_LIST_HEAD (&qtd_list);
1000
1001         switch (usb_pipetype (urb->pipe)) {
1002         case PIPE_CONTROL:
1003                 /* qh_completions() code doesn't handle all the fault cases
1004                  * in multi-TD control transfers.  Even 1KB is rare anyway.
1005                  */
1006                 if (urb->transfer_buffer_length > (16 * 1024))
1007                         return -EMSGSIZE;
1008                 /* FALLTHROUGH */
1009         /* case PIPE_BULK: */
1010         default:
1011                 if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags))
1012                         return -ENOMEM;
1013                 return submit_async(ehci, urb, &qtd_list, mem_flags);
1014
1015         case PIPE_INTERRUPT:
1016                 if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags))
1017                         return -ENOMEM;
1018                 return intr_submit(ehci, urb, &qtd_list, mem_flags);
1019
1020         case PIPE_ISOCHRONOUS:
1021                 if (urb->dev->speed == USB_SPEED_HIGH)
1022                         return itd_submit (ehci, urb, mem_flags);
1023                 else
1024                         return sitd_submit (ehci, urb, mem_flags);
1025         }
1026 }
1027
1028 static void unlink_async (struct ehci_hcd *ehci, struct ehci_qh *qh)
1029 {
1030         /* failfast */
1031         if (ehci->rh_state != EHCI_RH_RUNNING && ehci->reclaim)
1032                 end_unlink_async(ehci);
1033
1034         /* If the QH isn't linked then there's nothing we can do
1035          * unless we were called during a giveback, in which case
1036          * qh_completions() has to deal with it.
1037          */
1038         if (qh->qh_state != QH_STATE_LINKED) {
1039                 if (qh->qh_state == QH_STATE_COMPLETING)
1040                         qh->needs_rescan = 1;
1041                 return;
1042         }
1043
1044         /* defer till later if busy */
1045         if (ehci->reclaim) {
1046                 struct ehci_qh          *last;
1047
1048                 for (last = ehci->reclaim;
1049                                 last->reclaim;
1050                                 last = last->reclaim)
1051                         continue;
1052                 qh->qh_state = QH_STATE_UNLINK_WAIT;
1053                 last->reclaim = qh;
1054
1055         /* start IAA cycle */
1056         } else
1057                 start_unlink_async (ehci, qh);
1058 }
1059
1060 /* remove from hardware lists
1061  * completions normally happen asynchronously
1062  */
1063
1064 static int ehci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1065 {
1066         struct ehci_hcd         *ehci = hcd_to_ehci (hcd);
1067         struct ehci_qh          *qh;
1068         unsigned long           flags;
1069         int                     rc;
1070
1071         spin_lock_irqsave (&ehci->lock, flags);
1072         rc = usb_hcd_check_unlink_urb(hcd, urb, status);
1073         if (rc)
1074                 goto done;
1075
1076         switch (usb_pipetype (urb->pipe)) {
1077         // case PIPE_CONTROL:
1078         // case PIPE_BULK:
1079         default:
1080                 qh = (struct ehci_qh *) urb->hcpriv;
1081                 if (!qh)
1082                         break;
1083                 switch (qh->qh_state) {
1084                 case QH_STATE_LINKED:
1085                 case QH_STATE_COMPLETING:
1086                         unlink_async(ehci, qh);
1087                         break;
1088                 case QH_STATE_UNLINK:
1089                 case QH_STATE_UNLINK_WAIT:
1090                         /* already started */
1091                         break;
1092                 case QH_STATE_IDLE:
1093                         /* QH might be waiting for a Clear-TT-Buffer */
1094                         qh_completions(ehci, qh);
1095                         break;
1096                 }
1097                 break;
1098
1099         case PIPE_INTERRUPT:
1100                 qh = (struct ehci_qh *) urb->hcpriv;
1101                 if (!qh)
1102                         break;
1103                 switch (qh->qh_state) {
1104                 case QH_STATE_LINKED:
1105                 case QH_STATE_COMPLETING:
1106                         intr_deschedule (ehci, qh);
1107                         break;
1108                 case QH_STATE_IDLE:
1109                         qh_completions (ehci, qh);
1110                         break;
1111                 default:
1112                         ehci_dbg (ehci, "bogus qh %p state %d\n",
1113                                         qh, qh->qh_state);
1114                         goto done;
1115                 }
1116                 break;
1117
1118         case PIPE_ISOCHRONOUS:
1119                 // itd or sitd ...
1120
1121                 // wait till next completion, do it then.
1122                 // completion irqs can wait up to 1024 msec,
1123                 break;
1124         }
1125 done:
1126         spin_unlock_irqrestore (&ehci->lock, flags);
1127         return rc;
1128 }
1129
1130 /*-------------------------------------------------------------------------*/
1131
1132 // bulk qh holds the data toggle
1133
1134 static void
1135 ehci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep)
1136 {
1137         struct ehci_hcd         *ehci = hcd_to_ehci (hcd);
1138         unsigned long           flags;
1139         struct ehci_qh          *qh, *tmp;
1140
1141         /* ASSERT:  any requests/urbs are being unlinked */
1142         /* ASSERT:  nobody can be submitting urbs for this any more */
1143
1144 rescan:
1145         spin_lock_irqsave (&ehci->lock, flags);
1146         qh = ep->hcpriv;
1147         if (!qh)
1148                 goto done;
1149
1150         /* endpoints can be iso streams.  for now, we don't
1151          * accelerate iso completions ... so spin a while.
1152          */
1153         if (qh->hw == NULL) {
1154                 ehci_vdbg (ehci, "iso delay\n");
1155                 goto idle_timeout;
1156         }
1157
1158         if (ehci->rh_state != EHCI_RH_RUNNING)
1159                 qh->qh_state = QH_STATE_IDLE;
1160         switch (qh->qh_state) {
1161         case QH_STATE_LINKED:
1162         case QH_STATE_COMPLETING:
1163                 for (tmp = ehci->async->qh_next.qh;
1164                                 tmp && tmp != qh;
1165                                 tmp = tmp->qh_next.qh)
1166                         continue;
1167                 /* periodic qh self-unlinks on empty, and a COMPLETING qh
1168                  * may already be unlinked.
1169                  */
1170                 if (tmp)
1171                         unlink_async(ehci, qh);
1172                 /* FALL THROUGH */
1173         case QH_STATE_UNLINK:           /* wait for hw to finish? */
1174         case QH_STATE_UNLINK_WAIT:
1175 idle_timeout:
1176                 spin_unlock_irqrestore (&ehci->lock, flags);
1177                 schedule_timeout_uninterruptible(1);
1178                 goto rescan;
1179         case QH_STATE_IDLE:             /* fully unlinked */
1180                 if (qh->clearing_tt)
1181                         goto idle_timeout;
1182                 if (list_empty (&qh->qtd_list)) {
1183                         qh_put (qh);
1184                         break;
1185                 }
1186                 /* else FALL THROUGH */
1187         default:
1188                 /* caller was supposed to have unlinked any requests;
1189                  * that's not our job.  just leak this memory.
1190                  */
1191                 ehci_err (ehci, "qh %p (#%02x) state %d%s\n",
1192                         qh, ep->desc.bEndpointAddress, qh->qh_state,
1193                         list_empty (&qh->qtd_list) ? "" : "(has tds)");
1194                 break;
1195         }
1196         ep->hcpriv = NULL;
1197 done:
1198         spin_unlock_irqrestore (&ehci->lock, flags);
1199 }
1200
1201 static void
1202 ehci_endpoint_reset(struct usb_hcd *hcd, struct usb_host_endpoint *ep)
1203 {
1204         struct ehci_hcd         *ehci = hcd_to_ehci(hcd);
1205         struct ehci_qh          *qh;
1206         int                     eptype = usb_endpoint_type(&ep->desc);
1207         int                     epnum = usb_endpoint_num(&ep->desc);
1208         int                     is_out = usb_endpoint_dir_out(&ep->desc);
1209         unsigned long           flags;
1210
1211         if (eptype != USB_ENDPOINT_XFER_BULK && eptype != USB_ENDPOINT_XFER_INT)
1212                 return;
1213
1214         spin_lock_irqsave(&ehci->lock, flags);
1215         qh = ep->hcpriv;
1216
1217         /* For Bulk and Interrupt endpoints we maintain the toggle state
1218          * in the hardware; the toggle bits in udev aren't used at all.
1219          * When an endpoint is reset by usb_clear_halt() we must reset
1220          * the toggle bit in the QH.
1221          */
1222         if (qh) {
1223                 usb_settoggle(qh->dev, epnum, is_out, 0);
1224                 if (!list_empty(&qh->qtd_list)) {
1225                         WARN_ONCE(1, "clear_halt for a busy endpoint\n");
1226                 } else if (qh->qh_state == QH_STATE_LINKED ||
1227                                 qh->qh_state == QH_STATE_COMPLETING) {
1228
1229                         /* The toggle value in the QH can't be updated
1230                          * while the QH is active.  Unlink it now;
1231                          * re-linking will call qh_refresh().
1232                          */
1233                         if (eptype == USB_ENDPOINT_XFER_BULK)
1234                                 unlink_async(ehci, qh);
1235                         else
1236                                 intr_deschedule(ehci, qh);
1237                 }
1238         }
1239         spin_unlock_irqrestore(&ehci->lock, flags);
1240 }
1241
1242 static int ehci_get_frame (struct usb_hcd *hcd)
1243 {
1244         struct ehci_hcd         *ehci = hcd_to_ehci (hcd);
1245         return (ehci_read_frame_index(ehci) >> 3) % ehci->periodic_size;
1246 }
1247
1248 /*-------------------------------------------------------------------------*/
1249 /*
1250  * The EHCI in ChipIdea HDRC cannot be a separate module or device,
1251  * because its registers (and irq) are shared between host/gadget/otg
1252  * functions  and in order to facilitate role switching we cannot
1253  * give the ehci driver exclusive access to those.
1254  */
1255 #ifndef CHIPIDEA_EHCI
1256
1257 MODULE_DESCRIPTION(DRIVER_DESC);
1258 MODULE_AUTHOR (DRIVER_AUTHOR);
1259 MODULE_LICENSE ("GPL");
1260
1261 #ifdef CONFIG_PCI
1262 #include "ehci-pci.c"
1263 #define PCI_DRIVER              ehci_pci_driver
1264 #endif
1265
1266 #ifdef CONFIG_USB_EHCI_FSL
1267 #include "ehci-fsl.c"
1268 #define PLATFORM_DRIVER         ehci_fsl_driver
1269 #endif
1270
1271 #ifdef CONFIG_USB_EHCI_MXC
1272 #include "ehci-mxc.c"
1273 #define PLATFORM_DRIVER         ehci_mxc_driver
1274 #endif
1275
1276 #ifdef CONFIG_USB_EHCI_SH
1277 #include "ehci-sh.c"
1278 #define PLATFORM_DRIVER         ehci_hcd_sh_driver
1279 #endif
1280
1281 #ifdef CONFIG_MIPS_ALCHEMY
1282 #include "ehci-au1xxx.c"
1283 #define PLATFORM_DRIVER         ehci_hcd_au1xxx_driver
1284 #endif
1285
1286 #ifdef CONFIG_USB_EHCI_HCD_OMAP
1287 #include "ehci-omap.c"
1288 #define        PLATFORM_DRIVER         ehci_hcd_omap_driver
1289 #endif
1290
1291 #ifdef CONFIG_PPC_PS3
1292 #include "ehci-ps3.c"
1293 #define PS3_SYSTEM_BUS_DRIVER   ps3_ehci_driver
1294 #endif
1295
1296 #ifdef CONFIG_USB_EHCI_HCD_PPC_OF
1297 #include "ehci-ppc-of.c"
1298 #define OF_PLATFORM_DRIVER      ehci_hcd_ppc_of_driver
1299 #endif
1300
1301 #ifdef CONFIG_XPS_USB_HCD_XILINX
1302 #include "ehci-xilinx-of.c"
1303 #define XILINX_OF_PLATFORM_DRIVER       ehci_hcd_xilinx_of_driver
1304 #endif
1305
1306 #ifdef CONFIG_PLAT_ORION
1307 #include "ehci-orion.c"
1308 #define PLATFORM_DRIVER         ehci_orion_driver
1309 #endif
1310
1311 #ifdef CONFIG_ARCH_IXP4XX
1312 #include "ehci-ixp4xx.c"
1313 #define PLATFORM_DRIVER         ixp4xx_ehci_driver
1314 #endif
1315
1316 #ifdef CONFIG_USB_W90X900_EHCI
1317 #include "ehci-w90x900.c"
1318 #define PLATFORM_DRIVER         ehci_hcd_w90x900_driver
1319 #endif
1320
1321 #ifdef CONFIG_ARCH_AT91
1322 #include "ehci-atmel.c"
1323 #define PLATFORM_DRIVER         ehci_atmel_driver
1324 #endif
1325
1326 #ifdef CONFIG_USB_OCTEON_EHCI
1327 #include "ehci-octeon.c"
1328 #define PLATFORM_DRIVER         ehci_octeon_driver
1329 #endif
1330
1331 #ifdef CONFIG_USB_CNS3XXX_EHCI
1332 #include "ehci-cns3xxx.c"
1333 #define PLATFORM_DRIVER         cns3xxx_ehci_driver
1334 #endif
1335
1336 #ifdef CONFIG_ARCH_VT8500
1337 #include "ehci-vt8500.c"
1338 #define PLATFORM_DRIVER         vt8500_ehci_driver
1339 #endif
1340
1341 #ifdef CONFIG_PLAT_SPEAR
1342 #include "ehci-spear.c"
1343 #define PLATFORM_DRIVER         spear_ehci_hcd_driver
1344 #endif
1345
1346 #ifdef CONFIG_USB_EHCI_MSM
1347 #include "ehci-msm.c"
1348 #define PLATFORM_DRIVER         ehci_msm_driver
1349 #endif
1350
1351 #ifdef CONFIG_USB_EHCI_HCD_PMC_MSP
1352 #include "ehci-pmcmsp.c"
1353 #define PLATFORM_DRIVER         ehci_hcd_msp_driver
1354 #endif
1355
1356 #ifdef CONFIG_USB_EHCI_TEGRA
1357 #include "ehci-tegra.c"
1358 #define PLATFORM_DRIVER         tegra_ehci_driver
1359 #endif
1360
1361 #ifdef CONFIG_USB_EHCI_S5P
1362 #include "ehci-s5p.c"
1363 #define PLATFORM_DRIVER         s5p_ehci_driver
1364 #endif
1365
1366 #ifdef CONFIG_SPARC_LEON
1367 #include "ehci-grlib.c"
1368 #define PLATFORM_DRIVER         ehci_grlib_driver
1369 #endif
1370
1371 #ifdef CONFIG_CPU_XLR
1372 #include "ehci-xls.c"
1373 #define PLATFORM_DRIVER         ehci_xls_driver
1374 #endif
1375
1376 #ifdef CONFIG_USB_EHCI_MV
1377 #include "ehci-mv.c"
1378 #define        PLATFORM_DRIVER         ehci_mv_driver
1379 #endif
1380
1381 #ifdef CONFIG_MACH_LOONGSON1
1382 #include "ehci-ls1x.c"
1383 #define PLATFORM_DRIVER         ehci_ls1x_driver
1384 #endif
1385
1386 #ifdef CONFIG_MIPS_SEAD3
1387 #include "ehci-sead3.c"
1388 #define PLATFORM_DRIVER         ehci_hcd_sead3_driver
1389 #endif
1390
1391 #ifdef CONFIG_USB_EHCI_HCD_PLATFORM
1392 #include "ehci-platform.c"
1393 #define PLATFORM_DRIVER         ehci_platform_driver
1394 #endif
1395
1396 #if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
1397     !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
1398     !defined(XILINX_OF_PLATFORM_DRIVER)
1399 #error "missing bus glue for ehci-hcd"
1400 #endif
1401
1402 static int __init ehci_hcd_init(void)
1403 {
1404         int retval = 0;
1405
1406         if (usb_disabled())
1407                 return -ENODEV;
1408
1409         printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name);
1410         set_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
1411         if (test_bit(USB_UHCI_LOADED, &usb_hcds_loaded) ||
1412                         test_bit(USB_OHCI_LOADED, &usb_hcds_loaded))
1413                 printk(KERN_WARNING "Warning! ehci_hcd should always be loaded"
1414                                 " before uhci_hcd and ohci_hcd, not after\n");
1415
1416         pr_debug("%s: block sizes: qh %Zd qtd %Zd itd %Zd sitd %Zd\n",
1417                  hcd_name,
1418                  sizeof(struct ehci_qh), sizeof(struct ehci_qtd),
1419                  sizeof(struct ehci_itd), sizeof(struct ehci_sitd));
1420
1421 #ifdef DEBUG
1422         ehci_debug_root = debugfs_create_dir("ehci", usb_debug_root);
1423         if (!ehci_debug_root) {
1424                 retval = -ENOENT;
1425                 goto err_debug;
1426         }
1427 #endif
1428
1429 #ifdef PLATFORM_DRIVER
1430         retval = platform_driver_register(&PLATFORM_DRIVER);
1431         if (retval < 0)
1432                 goto clean0;
1433 #endif
1434
1435 #ifdef PCI_DRIVER
1436         retval = pci_register_driver(&PCI_DRIVER);
1437         if (retval < 0)
1438                 goto clean1;
1439 #endif
1440
1441 #ifdef PS3_SYSTEM_BUS_DRIVER
1442         retval = ps3_ehci_driver_register(&PS3_SYSTEM_BUS_DRIVER);
1443         if (retval < 0)
1444                 goto clean2;
1445 #endif
1446
1447 #ifdef OF_PLATFORM_DRIVER
1448         retval = platform_driver_register(&OF_PLATFORM_DRIVER);
1449         if (retval < 0)
1450                 goto clean3;
1451 #endif
1452
1453 #ifdef XILINX_OF_PLATFORM_DRIVER
1454         retval = platform_driver_register(&XILINX_OF_PLATFORM_DRIVER);
1455         if (retval < 0)
1456                 goto clean4;
1457 #endif
1458         return retval;
1459
1460 #ifdef XILINX_OF_PLATFORM_DRIVER
1461         /* platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER); */
1462 clean4:
1463 #endif
1464 #ifdef OF_PLATFORM_DRIVER
1465         platform_driver_unregister(&OF_PLATFORM_DRIVER);
1466 clean3:
1467 #endif
1468 #ifdef PS3_SYSTEM_BUS_DRIVER
1469         ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1470 clean2:
1471 #endif
1472 #ifdef PCI_DRIVER
1473         pci_unregister_driver(&PCI_DRIVER);
1474 clean1:
1475 #endif
1476 #ifdef PLATFORM_DRIVER
1477         platform_driver_unregister(&PLATFORM_DRIVER);
1478 clean0:
1479 #endif
1480 #ifdef DEBUG
1481         debugfs_remove(ehci_debug_root);
1482         ehci_debug_root = NULL;
1483 err_debug:
1484 #endif
1485         clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
1486         return retval;
1487 }
1488 module_init(ehci_hcd_init);
1489
1490 static void __exit ehci_hcd_cleanup(void)
1491 {
1492 #ifdef XILINX_OF_PLATFORM_DRIVER
1493         platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER);
1494 #endif
1495 #ifdef OF_PLATFORM_DRIVER
1496         platform_driver_unregister(&OF_PLATFORM_DRIVER);
1497 #endif
1498 #ifdef PLATFORM_DRIVER
1499         platform_driver_unregister(&PLATFORM_DRIVER);
1500 #endif
1501 #ifdef PCI_DRIVER
1502         pci_unregister_driver(&PCI_DRIVER);
1503 #endif
1504 #ifdef PS3_SYSTEM_BUS_DRIVER
1505         ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1506 #endif
1507 #ifdef DEBUG
1508         debugfs_remove(ehci_debug_root);
1509 #endif
1510         clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
1511 }
1512 module_exit(ehci_hcd_cleanup);
1513
1514 #endif /* CHIPIDEA_EHCI */