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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright (c) 2000-2004 by David Brownell
David Brownell53bd6a62006-08-30 14:50:06 -07003 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or (at your
7 * option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software Foundation,
16 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <linux/module.h>
20#include <linux/pci.h>
21#include <linux/dmapool.h>
22#include <linux/kernel.h>
23#include <linux/delay.h>
24#include <linux/ioport.h>
25#include <linux/sched.h>
26#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/errno.h>
28#include <linux/init.h>
29#include <linux/timer.h>
30#include <linux/list.h>
31#include <linux/interrupt.h>
32#include <linux/reboot.h>
33#include <linux/usb.h>
34#include <linux/moduleparam.h>
35#include <linux/dma-mapping.h>
36
37#include "../core/hcd.h"
38
39#include <asm/byteorder.h>
40#include <asm/io.h>
41#include <asm/irq.h>
42#include <asm/system.h>
43#include <asm/unaligned.h>
Ishizaki Kou48fda452007-02-14 16:04:17 +090044#ifdef CONFIG_PPC_PS3
45#include <asm/firmware.h>
46#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
48
49/*-------------------------------------------------------------------------*/
50
51/*
52 * EHCI hc_driver implementation ... experimental, incomplete.
53 * Based on the final 1.0 register interface specification.
54 *
55 * USB 2.0 shows up in upcoming www.pcmcia.org technology.
56 * First was PCMCIA, like ISA; then CardBus, which is PCI.
57 * Next comes "CardBay", using USB 2.0 signals.
58 *
59 * Contains additional contributions by Brad Hards, Rory Bolt, and others.
60 * Special thanks to Intel and VIA for providing host controllers to
61 * test this driver on, and Cypress (including In-System Design) for
62 * providing early devices for those host controllers to talk to!
63 *
64 * HISTORY:
65 *
66 * 2004-05-10 Root hub and PCI suspend/resume support; remote wakeup. (db)
67 * 2004-02-24 Replace pci_* with generic dma_* API calls (dsaxena@plexity.net)
68 * 2003-12-29 Rewritten high speed iso transfer support (by Michal Sojka,
69 * <sojkam@centrum.cz>, updates by DB).
70 *
71 * 2002-11-29 Correct handling for hw async_next register.
72 * 2002-08-06 Handling for bulk and interrupt transfers is mostly shared;
73 * only scheduling is different, no arbitrary limitations.
74 * 2002-07-25 Sanity check PCI reads, mostly for better cardbus support,
David Brownell53bd6a62006-08-30 14:50:06 -070075 * clean up HC run state handshaking.
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 * 2002-05-24 Preliminary FS/LS interrupts, using scheduling shortcuts
77 * 2002-05-11 Clear TT errors for FS/LS ctrl/bulk. Fill in some other
78 * missing pieces: enabling 64bit dma, handoff from BIOS/SMM.
79 * 2002-05-07 Some error path cleanups to report better errors; wmb();
80 * use non-CVS version id; better iso bandwidth claim.
81 * 2002-04-19 Control/bulk/interrupt submit no longer uses giveback() on
82 * errors in submit path. Bugfixes to interrupt scheduling/processing.
83 * 2002-03-05 Initial high-speed ISO support; reduce ITD memory; shift
84 * more checking to generic hcd framework (db). Make it work with
85 * Philips EHCI; reduce PCI traffic; shorten IRQ path (Rory Bolt).
86 * 2002-01-14 Minor cleanup; version synch.
87 * 2002-01-08 Fix roothub handoff of FS/LS to companion controllers.
88 * 2002-01-04 Control/Bulk queuing behaves.
89 *
90 * 2001-12-12 Initial patch version for Linux 2.5.1 kernel.
91 * 2001-June Works with usb-storage and NEC EHCI on 2.4
92 */
93
94#define DRIVER_VERSION "10 Dec 2004"
95#define DRIVER_AUTHOR "David Brownell"
96#define DRIVER_DESC "USB 2.0 'Enhanced' Host Controller (EHCI) Driver"
97
98static const char hcd_name [] = "ehci_hcd";
99
100
101#undef EHCI_VERBOSE_DEBUG
102#undef EHCI_URB_TRACE
103
104#ifdef DEBUG
105#define EHCI_STATS
106#endif
107
108/* magic numbers that can affect system performance */
109#define EHCI_TUNE_CERR 3 /* 0-3 qtd retries; 0 == don't stop */
110#define EHCI_TUNE_RL_HS 4 /* nak throttle; see 4.9 */
111#define EHCI_TUNE_RL_TT 0
112#define EHCI_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */
113#define EHCI_TUNE_MULT_TT 1
114#define EHCI_TUNE_FLS 2 /* (small) 256 frame schedule */
115
Greg Kroah-Hartman64f89792006-10-17 13:57:18 -0700116#define EHCI_IAA_JIFFIES (HZ/100) /* arbitrary; ~10 msec */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117#define EHCI_IO_JIFFIES (HZ/10) /* io watchdog > irq_thresh */
118#define EHCI_ASYNC_JIFFIES (HZ/20) /* async idle timeout */
119#define EHCI_SHRINK_JIFFIES (HZ/200) /* async qh unlink delay */
120
121/* Initial IRQ latency: faster than hw default */
122static int log2_irq_thresh = 0; // 0 to 6
123module_param (log2_irq_thresh, int, S_IRUGO);
124MODULE_PARM_DESC (log2_irq_thresh, "log2 IRQ latency, 1-64 microframes");
125
126/* initial park setting: slower than hw default */
127static unsigned park = 0;
128module_param (park, uint, S_IRUGO);
129MODULE_PARM_DESC (park, "park setting; 1-3 back-to-back async packets");
130
David Brownell93f1a472006-11-16 23:34:58 -0800131/* for flakey hardware, ignore overcurrent indicators */
132static int ignore_oc = 0;
133module_param (ignore_oc, bool, S_IRUGO);
134MODULE_PARM_DESC (ignore_oc, "ignore bogus hardware overcurrent indications");
135
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136#define INTR_MASK (STS_IAA | STS_FATAL | STS_PCD | STS_ERR | STS_INT)
137
138/*-------------------------------------------------------------------------*/
139
140#include "ehci.h"
141#include "ehci-dbg.c"
142
143/*-------------------------------------------------------------------------*/
144
145/*
146 * handshake - spin reading hc until handshake completes or fails
147 * @ptr: address of hc register to be read
148 * @mask: bits to look at in result of read
149 * @done: value of those bits when handshake succeeds
150 * @usec: timeout in microseconds
151 *
152 * Returns negative errno, or zero on success
153 *
154 * Success happens when the "mask" bits have the specified value (hardware
155 * handshake done). There are two failure modes: "usec" have passed (major
156 * hardware flakeout), or the register reads as all-ones (hardware removed).
157 *
158 * That last failure should_only happen in cases like physical cardbus eject
159 * before driver shutdown. But it also seems to be caused by bugs in cardbus
160 * bridge shutdown: shutting down the bridge before the devices using it.
161 */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100162static int handshake (struct ehci_hcd *ehci, void __iomem *ptr,
163 u32 mask, u32 done, int usec)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164{
165 u32 result;
166
167 do {
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100168 result = ehci_readl(ehci, ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 if (result == ~(u32)0) /* card removed */
170 return -ENODEV;
171 result &= mask;
172 if (result == done)
173 return 0;
174 udelay (1);
175 usec--;
176 } while (usec > 0);
177 return -ETIMEDOUT;
178}
179
180/* force HC to halt state from unknown (EHCI spec section 2.3) */
181static int ehci_halt (struct ehci_hcd *ehci)
182{
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100183 u32 temp = ehci_readl(ehci, &ehci->regs->status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184
David Brownell72f30b62005-09-27 10:19:39 -0700185 /* disable any irqs left enabled by previous code */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100186 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
David Brownell72f30b62005-09-27 10:19:39 -0700187
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 if ((temp & STS_HALT) != 0)
189 return 0;
190
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100191 temp = ehci_readl(ehci, &ehci->regs->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 temp &= ~CMD_RUN;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100193 ehci_writel(ehci, temp, &ehci->regs->command);
194 return handshake (ehci, &ehci->regs->status,
195 STS_HALT, STS_HALT, 16 * 125);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196}
197
198/* put TDI/ARC silicon into EHCI mode */
199static void tdi_reset (struct ehci_hcd *ehci)
200{
201 u32 __iomem *reg_ptr;
202 u32 tmp;
203
204 reg_ptr = (u32 __iomem *)(((u8 __iomem *)ehci->regs) + 0x68);
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100205 tmp = ehci_readl(ehci, reg_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 tmp |= 0x3;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100207 ehci_writel(ehci, tmp, reg_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208}
209
210/* reset a non-running (STS_HALT == 1) controller */
211static int ehci_reset (struct ehci_hcd *ehci)
212{
213 int retval;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100214 u32 command = ehci_readl(ehci, &ehci->regs->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215
216 command |= CMD_RESET;
217 dbg_cmd (ehci, "reset", command);
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100218 ehci_writel(ehci, command, &ehci->regs->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 ehci_to_hcd(ehci)->state = HC_STATE_HALT;
220 ehci->next_statechange = jiffies;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100221 retval = handshake (ehci, &ehci->regs->command,
222 CMD_RESET, 0, 250 * 1000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223
224 if (retval)
225 return retval;
226
227 if (ehci_is_TDI(ehci))
228 tdi_reset (ehci);
229
230 return retval;
231}
232
233/* idle the controller (from running) */
234static void ehci_quiesce (struct ehci_hcd *ehci)
235{
236 u32 temp;
237
238#ifdef DEBUG
239 if (!HC_IS_RUNNING (ehci_to_hcd(ehci)->state))
240 BUG ();
241#endif
242
243 /* wait for any schedule enables/disables to take effect */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100244 temp = ehci_readl(ehci, &ehci->regs->command) << 10;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 temp &= STS_ASS | STS_PSS;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100246 if (handshake (ehci, &ehci->regs->status, STS_ASS | STS_PSS,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 temp, 16 * 125) != 0) {
248 ehci_to_hcd(ehci)->state = HC_STATE_HALT;
249 return;
250 }
251
252 /* then disable anything that's still active */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100253 temp = ehci_readl(ehci, &ehci->regs->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 temp &= ~(CMD_ASE | CMD_IAAD | CMD_PSE);
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100255 ehci_writel(ehci, temp, &ehci->regs->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256
257 /* hardware can take 16 microframes to turn off ... */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100258 if (handshake (ehci, &ehci->regs->status, STS_ASS | STS_PSS,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 0, 16 * 125) != 0) {
260 ehci_to_hcd(ehci)->state = HC_STATE_HALT;
261 return;
262 }
263}
264
265/*-------------------------------------------------------------------------*/
266
David Howells7d12e782006-10-05 14:55:46 +0100267static void ehci_work(struct ehci_hcd *ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268
269#include "ehci-hub.c"
270#include "ehci-mem.c"
271#include "ehci-q.c"
272#include "ehci-sched.c"
273
274/*-------------------------------------------------------------------------*/
275
Stuart_Hayes@Dell.com196705c2007-05-03 08:58:49 -0700276#ifdef CONFIG_CPU_FREQ
277
278#include <linux/cpufreq.h>
279
280static void ehci_cpufreq_pause (struct ehci_hcd *ehci)
281{
282 unsigned long flags;
283
284 spin_lock_irqsave(&ehci->lock, flags);
285 if (!ehci->cpufreq_changing++)
286 qh_inactivate_split_intr_qhs(ehci);
287 spin_unlock_irqrestore(&ehci->lock, flags);
288}
289
290static void ehci_cpufreq_unpause (struct ehci_hcd *ehci)
291{
292 unsigned long flags;
293
294 spin_lock_irqsave(&ehci->lock, flags);
295 if (!--ehci->cpufreq_changing)
296 qh_reactivate_split_intr_qhs(ehci);
297 spin_unlock_irqrestore(&ehci->lock, flags);
298}
299
300/*
301 * ehci_cpufreq_notifier is needed to avoid MMF errors that occur when
302 * EHCI controllers that don't cache many uframes get delayed trying to
303 * read main memory during CPU frequency transitions. This can cause
304 * split interrupt transactions to not be completed in the required uframe.
305 * This has been observed on the Broadcom/ServerWorks HT1000 controller.
306 */
307static int ehci_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
308 void *data)
309{
310 struct ehci_hcd *ehci = container_of(nb, struct ehci_hcd,
311 cpufreq_transition);
312
313 switch (val) {
314 case CPUFREQ_PRECHANGE:
315 ehci_cpufreq_pause(ehci);
316 break;
317 case CPUFREQ_POSTCHANGE:
318 ehci_cpufreq_unpause(ehci);
319 break;
320 }
321 return 0;
322}
323
324#endif
325
326/*-------------------------------------------------------------------------*/
327
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328static void ehci_watchdog (unsigned long param)
329{
330 struct ehci_hcd *ehci = (struct ehci_hcd *) param;
331 unsigned long flags;
332
333 spin_lock_irqsave (&ehci->lock, flags);
334
Greg Kroah-Hartman64f89792006-10-17 13:57:18 -0700335 /* lost IAA irqs wedge things badly; seen with a vt8235 */
336 if (ehci->reclaim) {
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100337 u32 status = ehci_readl(ehci, &ehci->regs->status);
Greg Kroah-Hartman64f89792006-10-17 13:57:18 -0700338 if (status & STS_IAA) {
339 ehci_vdbg (ehci, "lost IAA\n");
340 COUNT (ehci->stats.lost_iaa);
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100341 ehci_writel(ehci, STS_IAA, &ehci->regs->status);
Greg Kroah-Hartman64f89792006-10-17 13:57:18 -0700342 ehci->reclaim_ready = 1;
343 }
344 }
345
346 /* stop async processing after it's idled a bit */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 if (test_bit (TIMER_ASYNC_OFF, &ehci->actions))
David Brownell26f953f2006-09-18 17:03:16 -0700348 start_unlink_async (ehci, ehci->async);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349
350 /* ehci could run by timer, without IRQs ... */
David Howells7d12e782006-10-05 14:55:46 +0100351 ehci_work (ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352
353 spin_unlock_irqrestore (&ehci->lock, flags);
354}
355
Alan Stern89037952007-02-13 14:55:27 -0500356/* On some systems, leaving remote wakeup enabled prevents system shutdown.
357 * The firmware seems to think that powering off is a wakeup event!
358 * This routine turns off remote wakeup and everything else, on all ports.
359 */
360static void ehci_turn_off_all_ports(struct ehci_hcd *ehci)
361{
362 int port = HCS_N_PORTS(ehci->hcs_params);
363
364 while (port--)
365 ehci_writel(ehci, PORT_RWC_BITS,
366 &ehci->regs->port_status[port]);
367}
368
Aleksey Gorelov64a21d02006-08-08 17:24:08 -0700369/* ehci_shutdown kick in for silicon on any bus (not just pci, etc).
David Brownell72f30b62005-09-27 10:19:39 -0700370 * This forcibly disables dma and IRQs, helping kexec and other cases
371 * where the next system software may expect clean state.
372 */
Aleksey Gorelov64a21d02006-08-08 17:24:08 -0700373static void
374ehci_shutdown (struct usb_hcd *hcd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375{
Aleksey Gorelov64a21d02006-08-08 17:24:08 -0700376 struct ehci_hcd *ehci;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377
Aleksey Gorelov64a21d02006-08-08 17:24:08 -0700378 ehci = hcd_to_ehci (hcd);
David Brownell72f30b62005-09-27 10:19:39 -0700379 (void) ehci_halt (ehci);
Alan Stern89037952007-02-13 14:55:27 -0500380 ehci_turn_off_all_ports(ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381
382 /* make BIOS/etc use companion controller during reboot */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100383 ehci_writel(ehci, 0, &ehci->regs->configured_flag);
Alan Stern89037952007-02-13 14:55:27 -0500384
385 /* unblock posted writes */
386 ehci_readl(ehci, &ehci->regs->configured_flag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387}
388
David Brownell56c1e262005-04-09 09:00:29 -0700389static void ehci_port_power (struct ehci_hcd *ehci, int is_on)
390{
391 unsigned port;
392
393 if (!HCS_PPC (ehci->hcs_params))
394 return;
395
396 ehci_dbg (ehci, "...power%s ports...\n", is_on ? "up" : "down");
397 for (port = HCS_N_PORTS (ehci->hcs_params); port > 0; )
398 (void) ehci_hub_control(ehci_to_hcd(ehci),
399 is_on ? SetPortFeature : ClearPortFeature,
400 USB_PORT_FEAT_POWER,
401 port--, NULL, 0);
Alan Stern383975d2007-05-04 11:52:40 -0400402 /* Flush those writes */
403 ehci_readl(ehci, &ehci->regs->command);
David Brownell56c1e262005-04-09 09:00:29 -0700404 msleep(20);
405}
406
Matt Porter7ff71d62005-09-22 22:31:15 -0700407/*-------------------------------------------------------------------------*/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408
Matt Porter7ff71d62005-09-22 22:31:15 -0700409/*
410 * ehci_work is called from some interrupts, timers, and so on.
411 * it calls driver completion functions, after dropping ehci->lock.
412 */
David Howells7d12e782006-10-05 14:55:46 +0100413static void ehci_work (struct ehci_hcd *ehci)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414{
Matt Porter7ff71d62005-09-22 22:31:15 -0700415 timer_action_done (ehci, TIMER_IO_WATCHDOG);
Greg Kroah-Hartman64f89792006-10-17 13:57:18 -0700416 if (ehci->reclaim_ready)
417 end_unlink_async (ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418
Matt Porter7ff71d62005-09-22 22:31:15 -0700419 /* another CPU may drop ehci->lock during a schedule scan while
420 * it reports urb completions. this flag guards against bogus
421 * attempts at re-entrant schedule scanning.
422 */
423 if (ehci->scanning)
424 return;
425 ehci->scanning = 1;
David Howells7d12e782006-10-05 14:55:46 +0100426 scan_async (ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700427 if (ehci->next_uframe != -1)
David Howells7d12e782006-10-05 14:55:46 +0100428 scan_periodic (ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700429 ehci->scanning = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430
Matt Porter7ff71d62005-09-22 22:31:15 -0700431 /* the IO watchdog guards against hardware or driver bugs that
432 * misplace IRQs, and should let us run completely without IRQs.
433 * such lossage has been observed on both VT6202 and VT8235.
434 */
435 if (HC_IS_RUNNING (ehci_to_hcd(ehci)->state) &&
436 (ehci->async->qh_next.ptr != NULL ||
437 ehci->periodic_sched != 0))
438 timer_action (ehci, TIMER_IO_WATCHDOG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439}
440
Matt Porter7ff71d62005-09-22 22:31:15 -0700441static void ehci_stop (struct usb_hcd *hcd)
442{
443 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
444
445 ehci_dbg (ehci, "stop\n");
446
447 /* Turn off port power on all root hub ports. */
448 ehci_port_power (ehci, 0);
449
450 /* no more interrupts ... */
451 del_timer_sync (&ehci->watchdog);
452
453 spin_lock_irq(&ehci->lock);
454 if (HC_IS_RUNNING (hcd->state))
455 ehci_quiesce (ehci);
456
457 ehci_reset (ehci);
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100458 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
Matt Porter7ff71d62005-09-22 22:31:15 -0700459 spin_unlock_irq(&ehci->lock);
460
Stuart_Hayes@Dell.com196705c2007-05-03 08:58:49 -0700461#ifdef CONFIG_CPU_FREQ
462 cpufreq_unregister_notifier(&ehci->cpufreq_transition,
463 CPUFREQ_TRANSITION_NOTIFIER);
464#endif
Matt Porter7ff71d62005-09-22 22:31:15 -0700465 /* let companion controllers work when we aren't */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100466 ehci_writel(ehci, 0, &ehci->regs->configured_flag);
Matt Porter7ff71d62005-09-22 22:31:15 -0700467
Alan Stern57e06c12007-01-16 11:59:45 -0500468 remove_companion_file(ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700469 remove_debug_files (ehci);
470
471 /* root hub is shut down separately (first, when possible) */
472 spin_lock_irq (&ehci->lock);
473 if (ehci->async)
David Howells7d12e782006-10-05 14:55:46 +0100474 ehci_work (ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700475 spin_unlock_irq (&ehci->lock);
476 ehci_mem_cleanup (ehci);
477
478#ifdef EHCI_STATS
479 ehci_dbg (ehci, "irq normal %ld err %ld reclaim %ld (lost %ld)\n",
480 ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim,
481 ehci->stats.lost_iaa);
482 ehci_dbg (ehci, "complete %ld unlink %ld\n",
483 ehci->stats.complete, ehci->stats.unlink);
484#endif
485
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100486 dbg_status (ehci, "ehci_stop completed",
487 ehci_readl(ehci, &ehci->regs->status));
Matt Porter7ff71d62005-09-22 22:31:15 -0700488}
489
David Brownell18807522005-11-23 15:45:37 -0800490/* one-time init, only for memory state */
491static int ehci_init(struct usb_hcd *hcd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492{
David Brownell18807522005-11-23 15:45:37 -0800493 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 u32 temp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 int retval;
496 u32 hcc_params;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497
David Brownell18807522005-11-23 15:45:37 -0800498 spin_lock_init(&ehci->lock);
499
500 init_timer(&ehci->watchdog);
501 ehci->watchdog.function = ehci_watchdog;
502 ehci->watchdog.data = (unsigned long) ehci;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503
504 /*
505 * hw default: 1K periodic list heads, one per frame.
506 * periodic_size can shrink by USBCMD update if hcc_params allows.
507 */
508 ehci->periodic_size = DEFAULT_I_TDPS;
David Brownell18807522005-11-23 15:45:37 -0800509 if ((retval = ehci_mem_init(ehci, GFP_KERNEL)) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 return retval;
511
512 /* controllers may cache some of the periodic schedule ... */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100513 hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params);
David Brownell53bd6a62006-08-30 14:50:06 -0700514 if (HCC_ISOC_CACHE(hcc_params)) // full frame cache
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 ehci->i_thresh = 8;
516 else // N microframes cached
David Brownell18807522005-11-23 15:45:37 -0800517 ehci->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518
519 ehci->reclaim = NULL;
Greg Kroah-Hartman64f89792006-10-17 13:57:18 -0700520 ehci->reclaim_ready = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 ehci->next_uframe = -1;
522
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 /*
524 * dedicate a qh for the async ring head, since we couldn't unlink
525 * a 'real' qh without stopping the async schedule [4.8]. use it
526 * as the 'reclamation list head' too.
527 * its dummy is used in hw_alt_next of many tds, to prevent the qh
528 * from automatically advancing to the next td after short reads.
529 */
David Brownell18807522005-11-23 15:45:37 -0800530 ehci->async->qh_next.qh = NULL;
Stefan Roese6dbd6822007-05-01 09:29:37 -0700531 ehci->async->hw_next = QH_NEXT(ehci, ehci->async->qh_dma);
532 ehci->async->hw_info1 = cpu_to_hc32(ehci, QH_HEAD);
533 ehci->async->hw_token = cpu_to_hc32(ehci, QTD_STS_HALT);
534 ehci->async->hw_qtd_next = EHCI_LIST_END(ehci);
David Brownell18807522005-11-23 15:45:37 -0800535 ehci->async->qh_state = QH_STATE_LINKED;
Stefan Roese6dbd6822007-05-01 09:29:37 -0700536 ehci->async->hw_alt_next = QTD_NEXT(ehci, ehci->async->dummy->qtd_dma);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537
538 /* clear interrupt enables, set irq latency */
539 if (log2_irq_thresh < 0 || log2_irq_thresh > 6)
540 log2_irq_thresh = 0;
541 temp = 1 << (16 + log2_irq_thresh);
542 if (HCC_CANPARK(hcc_params)) {
543 /* HW default park == 3, on hardware that supports it (like
544 * NVidia and ALI silicon), maximizes throughput on the async
545 * schedule by avoiding QH fetches between transfers.
546 *
547 * With fast usb storage devices and NForce2, "park" seems to
548 * make problems: throughput reduction (!), data errors...
549 */
550 if (park) {
David Brownell18807522005-11-23 15:45:37 -0800551 park = min(park, (unsigned) 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 temp |= CMD_PARK;
553 temp |= park << 8;
554 }
David Brownell18807522005-11-23 15:45:37 -0800555 ehci_dbg(ehci, "park %d\n", park);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 }
David Brownell18807522005-11-23 15:45:37 -0800557 if (HCC_PGM_FRAMELISTLEN(hcc_params)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 /* periodic schedule size can be smaller than default */
559 temp &= ~(3 << 2);
560 temp |= (EHCI_TUNE_FLS << 2);
561 switch (EHCI_TUNE_FLS) {
562 case 0: ehci->periodic_size = 1024; break;
563 case 1: ehci->periodic_size = 512; break;
564 case 2: ehci->periodic_size = 256; break;
David Brownell18807522005-11-23 15:45:37 -0800565 default: BUG();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 }
567 }
David Brownell18807522005-11-23 15:45:37 -0800568 ehci->command = temp;
569
Stuart_Hayes@Dell.com196705c2007-05-03 08:58:49 -0700570#ifdef CONFIG_CPU_FREQ
571 INIT_LIST_HEAD(&ehci->split_intr_qhs);
572 /*
573 * If the EHCI controller caches enough uframes, this probably
574 * isn't needed unless there are so many low/full speed devices
575 * that the controller's can't cache it all.
576 */
577 ehci->cpufreq_transition.notifier_call = ehci_cpufreq_notifier;
578 cpufreq_register_notifier(&ehci->cpufreq_transition,
579 CPUFREQ_TRANSITION_NOTIFIER);
580#endif
David Brownell18807522005-11-23 15:45:37 -0800581 return 0;
582}
583
584/* start HC running; it's halted, ehci_init() has been run (once) */
585static int ehci_run (struct usb_hcd *hcd)
586{
587 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
588 int retval;
589 u32 temp;
590 u32 hcc_params;
591
Marcelo Tosatti1d619f12007-01-21 19:45:59 -0200592 hcd->uses_new_polling = 1;
593 hcd->poll_rh = 0;
594
David Brownell18807522005-11-23 15:45:37 -0800595 /* EHCI spec section 4.1 */
596 if ((retval = ehci_reset(ehci)) != 0) {
David Brownell18807522005-11-23 15:45:37 -0800597 ehci_mem_cleanup(ehci);
598 return retval;
599 }
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100600 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
601 ehci_writel(ehci, (u32)ehci->async->qh_dma, &ehci->regs->async_next);
David Brownell18807522005-11-23 15:45:37 -0800602
603 /*
604 * hcc_params controls whether ehci->regs->segment must (!!!)
605 * be used; it constrains QH/ITD/SITD and QTD locations.
606 * pci_pool consistent memory always uses segment zero.
607 * streaming mappings for I/O buffers, like pci_map_single(),
608 * can return segments above 4GB, if the device allows.
609 *
610 * NOTE: the dma mask is visible through dma_supported(), so
611 * drivers can pass this info along ... like NETIF_F_HIGHDMA,
612 * Scsi_Host.highmem_io, and so forth. It's readonly to all
613 * host side drivers though.
614 */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100615 hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params);
David Brownell18807522005-11-23 15:45:37 -0800616 if (HCC_64BIT_ADDR(hcc_params)) {
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100617 ehci_writel(ehci, 0, &ehci->regs->segment);
David Brownell18807522005-11-23 15:45:37 -0800618#if 0
619// this is deeply broken on almost all architectures
620 if (!dma_set_mask(hcd->self.controller, DMA_64BIT_MASK))
621 ehci_info(ehci, "enabled 64bit DMA\n");
622#endif
623 }
624
625
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626 // Philips, Intel, and maybe others need CMD_RUN before the
627 // root hub will detect new devices (why?); NEC doesn't
David Brownell18807522005-11-23 15:45:37 -0800628 ehci->command &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET);
629 ehci->command |= CMD_RUN;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100630 ehci_writel(ehci, ehci->command, &ehci->regs->command);
David Brownell18807522005-11-23 15:45:37 -0800631 dbg_cmd (ehci, "init", ehci->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 /*
634 * Start, enabling full USB 2.0 functionality ... usb 1.1 devices
635 * are explicitly handed to companion controller(s), so no TT is
636 * involved with the root hub. (Except where one is integrated,
637 * and there's no companion controller unless maybe for USB OTG.)
638 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 hcd->state = HC_STATE_RUNNING;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100640 ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
641 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100643 temp = HC_VERSION(ehci_readl(ehci, &ehci->caps->hc_capbase));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 ehci_info (ehci,
David Brownell93f1a472006-11-16 23:34:58 -0800645 "USB %x.%x started, EHCI %x.%02x, driver %s%s\n",
Matt Porter7ff71d62005-09-22 22:31:15 -0700646 ((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f),
David Brownell93f1a472006-11-16 23:34:58 -0800647 temp >> 8, temp & 0xff, DRIVER_VERSION,
648 ignore_oc ? ", overcurrent ignored" : "");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100650 ehci_writel(ehci, INTR_MASK,
651 &ehci->regs->intr_enable); /* Turn On Interrupts */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652
David Brownell18807522005-11-23 15:45:37 -0800653 /* GRR this is run-once init(), being done every time the HC starts.
654 * So long as they're part of class devices, we can't do it init()
655 * since the class device isn't created that early.
656 */
657 create_debug_files(ehci);
Alan Stern57e06c12007-01-16 11:59:45 -0500658 create_companion_file(ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659
660 return 0;
661}
662
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663/*-------------------------------------------------------------------------*/
664
David Howells7d12e782006-10-05 14:55:46 +0100665static irqreturn_t ehci_irq (struct usb_hcd *hcd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666{
667 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
Marcelo Tosatti1d619f12007-01-21 19:45:59 -0200668 u32 status, pcd_status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669 int bh;
670
671 spin_lock (&ehci->lock);
672
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100673 status = ehci_readl(ehci, &ehci->regs->status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674
675 /* e.g. cardbus physical eject */
676 if (status == ~(u32) 0) {
677 ehci_dbg (ehci, "device removed\n");
678 goto dead;
679 }
680
681 status &= INTR_MASK;
682 if (!status) { /* irq sharing? */
683 spin_unlock(&ehci->lock);
684 return IRQ_NONE;
685 }
686
687 /* clear (just) interrupts */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100688 ehci_writel(ehci, status, &ehci->regs->status);
689 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690 bh = 0;
691
692#ifdef EHCI_VERBOSE_DEBUG
693 /* unrequested/ignored: Frame List Rollover */
694 dbg_status (ehci, "irq", status);
695#endif
696
697 /* INT, ERR, and IAA interrupt rates can be throttled */
698
699 /* normal [4.15.1.2] or error [4.15.1.1] completion */
700 if (likely ((status & (STS_INT|STS_ERR)) != 0)) {
701 if (likely ((status & STS_ERR) == 0))
702 COUNT (ehci->stats.normal);
703 else
704 COUNT (ehci->stats.error);
705 bh = 1;
706 }
707
708 /* complete the unlinking of some qh [4.15.2.3] */
709 if (status & STS_IAA) {
710 COUNT (ehci->stats.reclaim);
Greg Kroah-Hartman64f89792006-10-17 13:57:18 -0700711 ehci->reclaim_ready = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 bh = 1;
713 }
714
715 /* remote wakeup [4.3.1] */
David Brownelld97cc2f2005-12-22 17:05:18 -0800716 if (status & STS_PCD) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 unsigned i = HCS_N_PORTS (ehci->hcs_params);
Marcelo Tosatti1d619f12007-01-21 19:45:59 -0200718 pcd_status = status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719
720 /* resume root hub? */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100721 if (!(ehci_readl(ehci, &ehci->regs->command) & CMD_RUN))
Alan Stern8c033562006-11-09 14:42:16 -0500722 usb_hcd_resume_root_hub(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723
724 while (i--) {
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100725 int pstatus = ehci_readl(ehci,
726 &ehci->regs->port_status [i]);
David Brownellb972b682006-06-30 02:34:42 -0700727
728 if (pstatus & PORT_OWNER)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 continue;
David Brownellb972b682006-06-30 02:34:42 -0700730 if (!(pstatus & PORT_RESUME)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 || ehci->reset_done [i] != 0)
732 continue;
733
734 /* start 20 msec resume signaling from this port,
735 * and make khubd collect PORT_STAT_C_SUSPEND to
736 * stop that signaling.
737 */
738 ehci->reset_done [i] = jiffies + msecs_to_jiffies (20);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739 ehci_dbg (ehci, "port %d remote wakeup\n", i + 1);
Alan Stern61e8b852007-04-09 11:52:31 -0400740 mod_timer(&hcd->rh_timer, ehci->reset_done[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741 }
742 }
743
744 /* PCI errors [4.15.2.4] */
745 if (unlikely ((status & STS_FATAL) != 0)) {
746 /* bogus "fatal" IRQs appear on some chips... why? */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100747 status = ehci_readl(ehci, &ehci->regs->status);
748 dbg_cmd (ehci, "fatal", ehci_readl(ehci,
749 &ehci->regs->command));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750 dbg_status (ehci, "fatal", status);
751 if (status & STS_HALT) {
752 ehci_err (ehci, "fatal error\n");
753dead:
754 ehci_reset (ehci);
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100755 ehci_writel(ehci, 0, &ehci->regs->configured_flag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 /* generic layer kills/unlinks all urbs, then
757 * uses ehci_stop to clean up the rest
758 */
759 bh = 1;
760 }
761 }
762
763 if (bh)
David Howells7d12e782006-10-05 14:55:46 +0100764 ehci_work (ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765 spin_unlock (&ehci->lock);
Marcelo Tosatti1d619f12007-01-21 19:45:59 -0200766 if (pcd_status & STS_PCD)
767 usb_hcd_poll_rh_status(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 return IRQ_HANDLED;
769}
770
771/*-------------------------------------------------------------------------*/
772
773/*
774 * non-error returns are a promise to giveback() the urb later
775 * we drop ownership so next owner (or urb unlink) can get it
776 *
777 * urb + dev is in hcd.self.controller.urb_list
778 * we're queueing TDs onto software and hardware lists
779 *
780 * hcd-specific init for hcpriv hasn't been done yet
781 *
782 * NOTE: control, bulk, and interrupt share the same code to append TDs
783 * to a (possibly active) QH, and the same QH scanning code.
784 */
785static int ehci_urb_enqueue (
786 struct usb_hcd *hcd,
787 struct usb_host_endpoint *ep,
788 struct urb *urb,
Al Viro55016f12005-10-21 03:21:58 -0400789 gfp_t mem_flags
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790) {
791 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
792 struct list_head qtd_list;
793
794 INIT_LIST_HEAD (&qtd_list);
795
796 switch (usb_pipetype (urb->pipe)) {
797 // case PIPE_CONTROL:
798 // case PIPE_BULK:
799 default:
800 if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags))
801 return -ENOMEM;
802 return submit_async (ehci, ep, urb, &qtd_list, mem_flags);
803
804 case PIPE_INTERRUPT:
805 if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags))
806 return -ENOMEM;
807 return intr_submit (ehci, ep, urb, &qtd_list, mem_flags);
808
809 case PIPE_ISOCHRONOUS:
810 if (urb->dev->speed == USB_SPEED_HIGH)
811 return itd_submit (ehci, urb, mem_flags);
812 else
813 return sitd_submit (ehci, urb, mem_flags);
814 }
815}
816
817static void unlink_async (struct ehci_hcd *ehci, struct ehci_qh *qh)
818{
Greg Kroah-Hartman64f89792006-10-17 13:57:18 -0700819 /* if we need to use IAA and it's busy, defer */
820 if (qh->qh_state == QH_STATE_LINKED
821 && ehci->reclaim
822 && HC_IS_RUNNING (ehci_to_hcd(ehci)->state)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823 struct ehci_qh *last;
824
825 for (last = ehci->reclaim;
826 last->reclaim;
827 last = last->reclaim)
828 continue;
829 qh->qh_state = QH_STATE_UNLINK_WAIT;
830 last->reclaim = qh;
831
Greg Kroah-Hartman64f89792006-10-17 13:57:18 -0700832 /* bypass IAA if the hc can't care */
833 } else if (!HC_IS_RUNNING (ehci_to_hcd(ehci)->state) && ehci->reclaim)
834 end_unlink_async (ehci);
835
836 /* something else might have unlinked the qh by now */
837 if (qh->qh_state == QH_STATE_LINKED)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 start_unlink_async (ehci, qh);
839}
840
841/* remove from hardware lists
842 * completions normally happen asynchronously
843 */
844
845static int ehci_urb_dequeue (struct usb_hcd *hcd, struct urb *urb)
846{
847 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
848 struct ehci_qh *qh;
849 unsigned long flags;
850
851 spin_lock_irqsave (&ehci->lock, flags);
852 switch (usb_pipetype (urb->pipe)) {
853 // case PIPE_CONTROL:
854 // case PIPE_BULK:
855 default:
856 qh = (struct ehci_qh *) urb->hcpriv;
857 if (!qh)
858 break;
Greg Kroah-Hartman64f89792006-10-17 13:57:18 -0700859 unlink_async (ehci, qh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860 break;
861
862 case PIPE_INTERRUPT:
863 qh = (struct ehci_qh *) urb->hcpriv;
864 if (!qh)
865 break;
866 switch (qh->qh_state) {
867 case QH_STATE_LINKED:
868 intr_deschedule (ehci, qh);
869 /* FALL THROUGH */
870 case QH_STATE_IDLE:
David Howells7d12e782006-10-05 14:55:46 +0100871 qh_completions (ehci, qh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872 break;
873 default:
874 ehci_dbg (ehci, "bogus qh %p state %d\n",
875 qh, qh->qh_state);
876 goto done;
877 }
878
879 /* reschedule QH iff another request is queued */
880 if (!list_empty (&qh->qtd_list)
881 && HC_IS_RUNNING (hcd->state)) {
882 int status;
883
884 status = qh_schedule (ehci, qh);
885 spin_unlock_irqrestore (&ehci->lock, flags);
886
887 if (status != 0) {
888 // shouldn't happen often, but ...
889 // FIXME kill those tds' urbs
890 err ("can't reschedule qh %p, err %d",
891 qh, status);
892 }
893 return status;
894 }
895 break;
896
897 case PIPE_ISOCHRONOUS:
898 // itd or sitd ...
899
900 // wait till next completion, do it then.
901 // completion irqs can wait up to 1024 msec,
902 break;
903 }
904done:
905 spin_unlock_irqrestore (&ehci->lock, flags);
906 return 0;
907}
908
909/*-------------------------------------------------------------------------*/
910
911// bulk qh holds the data toggle
912
913static void
914ehci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep)
915{
916 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
917 unsigned long flags;
918 struct ehci_qh *qh, *tmp;
919
920 /* ASSERT: any requests/urbs are being unlinked */
921 /* ASSERT: nobody can be submitting urbs for this any more */
922
923rescan:
924 spin_lock_irqsave (&ehci->lock, flags);
925 qh = ep->hcpriv;
926 if (!qh)
927 goto done;
928
929 /* endpoints can be iso streams. for now, we don't
930 * accelerate iso completions ... so spin a while.
931 */
932 if (qh->hw_info1 == 0) {
933 ehci_vdbg (ehci, "iso delay\n");
934 goto idle_timeout;
935 }
936
937 if (!HC_IS_RUNNING (hcd->state))
938 qh->qh_state = QH_STATE_IDLE;
939 switch (qh->qh_state) {
940 case QH_STATE_LINKED:
941 for (tmp = ehci->async->qh_next.qh;
942 tmp && tmp != qh;
943 tmp = tmp->qh_next.qh)
944 continue;
945 /* periodic qh self-unlinks on empty */
946 if (!tmp)
947 goto nogood;
948 unlink_async (ehci, qh);
949 /* FALL THROUGH */
950 case QH_STATE_UNLINK: /* wait for hw to finish? */
951idle_timeout:
952 spin_unlock_irqrestore (&ehci->lock, flags);
Nishanth Aravamudan22c43862005-08-15 11:30:11 -0700953 schedule_timeout_uninterruptible(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954 goto rescan;
955 case QH_STATE_IDLE: /* fully unlinked */
956 if (list_empty (&qh->qtd_list)) {
957 qh_put (qh);
958 break;
959 }
960 /* else FALL THROUGH */
961 default:
962nogood:
963 /* caller was supposed to have unlinked any requests;
964 * that's not our job. just leak this memory.
965 */
966 ehci_err (ehci, "qh %p (#%02x) state %d%s\n",
967 qh, ep->desc.bEndpointAddress, qh->qh_state,
968 list_empty (&qh->qtd_list) ? "" : "(has tds)");
969 break;
970 }
971 ep->hcpriv = NULL;
972done:
973 spin_unlock_irqrestore (&ehci->lock, flags);
974 return;
975}
976
Matt Porter7ff71d62005-09-22 22:31:15 -0700977static int ehci_get_frame (struct usb_hcd *hcd)
978{
979 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100980 return (ehci_readl(ehci, &ehci->regs->frame_index) >> 3) %
981 ehci->periodic_size;
Matt Porter7ff71d62005-09-22 22:31:15 -0700982}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983
984/*-------------------------------------------------------------------------*/
985
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986#define DRIVER_INFO DRIVER_VERSION " " DRIVER_DESC
987
988MODULE_DESCRIPTION (DRIVER_INFO);
989MODULE_AUTHOR (DRIVER_AUTHOR);
990MODULE_LICENSE ("GPL");
991
Matt Porter7ff71d62005-09-22 22:31:15 -0700992#ifdef CONFIG_PCI
993#include "ehci-pci.c"
Kumar Gala01cced22006-04-11 10:07:16 -0500994#define PCI_DRIVER ehci_pci_driver
Matt Porter7ff71d62005-09-22 22:31:15 -0700995#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996
Li Yanga11570f2006-07-14 19:58:14 +0800997#ifdef CONFIG_MPC834x
Randy Vinson80cb9ae2006-01-20 13:53:38 -0800998#include "ehci-fsl.c"
Kumar Gala01cced22006-04-11 10:07:16 -0500999#define PLATFORM_DRIVER ehci_fsl_driver
Randy Vinson80cb9ae2006-01-20 13:53:38 -08001000#endif
1001
Ralf Baechledfbaa7d2006-06-03 23:58:55 +01001002#ifdef CONFIG_SOC_AU1200
Jordan Crouse76fa9a22006-01-20 14:06:09 -08001003#include "ehci-au1xxx.c"
Kumar Gala01cced22006-04-11 10:07:16 -05001004#define PLATFORM_DRIVER ehci_hcd_au1xxx_driver
Jordan Crouse76fa9a22006-01-20 14:06:09 -08001005#endif
1006
Geoff Levandad75a412007-01-15 20:11:47 -08001007#ifdef CONFIG_PPC_PS3
1008#include "ehci-ps3.c"
1009#define PS3_SYSTEM_BUS_DRIVER ps3_ehci_sb_driver
1010#endif
1011
1012#if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
1013 !defined(PS3_SYSTEM_BUS_DRIVER)
Matt Porter7ff71d62005-09-22 22:31:15 -07001014#error "missing bus glue for ehci-hcd"
1015#endif
Kumar Gala01cced22006-04-11 10:07:16 -05001016
1017static int __init ehci_hcd_init(void)
1018{
1019 int retval = 0;
1020
1021 pr_debug("%s: block sizes: qh %Zd qtd %Zd itd %Zd sitd %Zd\n",
1022 hcd_name,
1023 sizeof(struct ehci_qh), sizeof(struct ehci_qtd),
1024 sizeof(struct ehci_itd), sizeof(struct ehci_sitd));
1025
1026#ifdef PLATFORM_DRIVER
1027 retval = platform_driver_register(&PLATFORM_DRIVER);
1028 if (retval < 0)
1029 return retval;
1030#endif
1031
1032#ifdef PCI_DRIVER
1033 retval = pci_register_driver(&PCI_DRIVER);
1034 if (retval < 0) {
1035#ifdef PLATFORM_DRIVER
1036 platform_driver_unregister(&PLATFORM_DRIVER);
1037#endif
Geoff Levandad75a412007-01-15 20:11:47 -08001038 return retval;
1039 }
1040#endif
1041
1042#ifdef PS3_SYSTEM_BUS_DRIVER
Ishizaki Kou48fda452007-02-14 16:04:17 +09001043 if (firmware_has_feature(FW_FEATURE_PS3_LV1)) {
1044 retval = ps3_system_bus_driver_register(
1045 &PS3_SYSTEM_BUS_DRIVER);
1046 if (retval < 0) {
Geoff Levandad75a412007-01-15 20:11:47 -08001047#ifdef PLATFORM_DRIVER
Ishizaki Kou48fda452007-02-14 16:04:17 +09001048 platform_driver_unregister(&PLATFORM_DRIVER);
Geoff Levandad75a412007-01-15 20:11:47 -08001049#endif
1050#ifdef PCI_DRIVER
Ishizaki Kou48fda452007-02-14 16:04:17 +09001051 pci_unregister_driver(&PCI_DRIVER);
Geoff Levandad75a412007-01-15 20:11:47 -08001052#endif
Ishizaki Kou48fda452007-02-14 16:04:17 +09001053 return retval;
1054 }
Kumar Gala01cced22006-04-11 10:07:16 -05001055 }
1056#endif
1057
1058 return retval;
1059}
1060module_init(ehci_hcd_init);
1061
1062static void __exit ehci_hcd_cleanup(void)
1063{
1064#ifdef PLATFORM_DRIVER
1065 platform_driver_unregister(&PLATFORM_DRIVER);
1066#endif
1067#ifdef PCI_DRIVER
1068 pci_unregister_driver(&PCI_DRIVER);
1069#endif
Geoff Levandad75a412007-01-15 20:11:47 -08001070#ifdef PS3_SYSTEM_BUS_DRIVER
Ishizaki Kou48fda452007-02-14 16:04:17 +09001071 if (firmware_has_feature(FW_FEATURE_PS3_LV1))
1072 ps3_system_bus_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
Geoff Levandad75a412007-01-15 20:11:47 -08001073#endif
Kumar Gala01cced22006-04-11 10:07:16 -05001074}
1075module_exit(ehci_hcd_cleanup);
1076