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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Alan Stern578333a2011-06-15 16:32:46 -04002 * Enhanced Host Controller Interface (EHCI) driver for USB.
3 *
4 * Maintainer: Alan Stern <stern@rowland.harvard.edu>
5 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 * Copyright (c) 2000-2004 by David Brownell
David Brownell53bd6a62006-08-30 14:50:06 -07007 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#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>
Ming Lei3c04e202008-09-18 23:06:21 +080030#include <linux/vmalloc.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include <linux/errno.h>
32#include <linux/init.h>
33#include <linux/timer.h>
Oliver Neukumee4ecb82009-11-27 15:17:59 +010034#include <linux/ktime.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include <linux/list.h>
36#include <linux/interrupt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include <linux/usb.h>
Eric Lescouet27729aa2010-04-24 23:21:52 +020038#include <linux/usb/hcd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include <linux/moduleparam.h>
40#include <linux/dma-mapping.h>
Tony Jones694cc202007-09-11 14:07:31 -070041#include <linux/debugfs.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090042#include <linux/slab.h>
Alek Duaa4d8342010-06-04 15:47:54 +080043#include <linux/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <asm/byteorder.h>
46#include <asm/io.h>
47#include <asm/irq.h>
48#include <asm/system.h>
49#include <asm/unaligned.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
51/*-------------------------------------------------------------------------*/
52
53/*
54 * EHCI hc_driver implementation ... experimental, incomplete.
55 * Based on the final 1.0 register interface specification.
56 *
57 * USB 2.0 shows up in upcoming www.pcmcia.org technology.
58 * First was PCMCIA, like ISA; then CardBus, which is PCI.
59 * Next comes "CardBay", using USB 2.0 signals.
60 *
61 * Contains additional contributions by Brad Hards, Rory Bolt, and others.
62 * Special thanks to Intel and VIA for providing host controllers to
63 * test this driver on, and Cypress (including In-System Design) for
64 * providing early devices for those host controllers to talk to!
Linus Torvalds1da177e2005-04-16 15:20:36 -070065 */
66
Linus Torvalds1da177e2005-04-16 15:20:36 -070067#define DRIVER_AUTHOR "David Brownell"
68#define DRIVER_DESC "USB 2.0 'Enhanced' Host Controller (EHCI) Driver"
69
70static const char hcd_name [] = "ehci_hcd";
71
72
David Brownell9776afc2008-02-01 11:42:05 -080073#undef VERBOSE_DEBUG
Linus Torvalds1da177e2005-04-16 15:20:36 -070074#undef EHCI_URB_TRACE
75
76#ifdef DEBUG
77#define EHCI_STATS
78#endif
79
80/* magic numbers that can affect system performance */
81#define EHCI_TUNE_CERR 3 /* 0-3 qtd retries; 0 == don't stop */
82#define EHCI_TUNE_RL_HS 4 /* nak throttle; see 4.9 */
83#define EHCI_TUNE_RL_TT 0
84#define EHCI_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */
85#define EHCI_TUNE_MULT_TT 1
Alan Sternffda0802010-07-14 11:03:46 -040086/*
87 * Some drivers think it's safe to schedule isochronous transfers more than
88 * 256 ms into the future (partly as a result of an old bug in the scheduling
89 * code). In an attempt to avoid trouble, we will use a minimum scheduling
90 * length of 512 frames instead of 256.
91 */
92#define EHCI_TUNE_FLS 1 /* (medium) 512-frame schedule */
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
Alan Stern07d29b62007-12-11 16:05:30 -050094#define EHCI_IAA_MSECS 10 /* arbitrary */
Linus Torvalds1da177e2005-04-16 15:20:36 -070095#define EHCI_IO_JIFFIES (HZ/10) /* io watchdog > irq_thresh */
96#define EHCI_ASYNC_JIFFIES (HZ/20) /* async idle timeout */
Alan Stern004c1962011-07-05 12:34:05 -040097#define EHCI_SHRINK_JIFFIES (DIV_ROUND_UP(HZ, 200) + 1)
98 /* 200-ms async qh unlink delay */
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
100/* Initial IRQ latency: faster than hw default */
101static int log2_irq_thresh = 0; // 0 to 6
102module_param (log2_irq_thresh, int, S_IRUGO);
103MODULE_PARM_DESC (log2_irq_thresh, "log2 IRQ latency, 1-64 microframes");
104
105/* initial park setting: slower than hw default */
106static unsigned park = 0;
107module_param (park, uint, S_IRUGO);
108MODULE_PARM_DESC (park, "park setting; 1-3 back-to-back async packets");
109
David Brownell93f1a472006-11-16 23:34:58 -0800110/* for flakey hardware, ignore overcurrent indicators */
111static int ignore_oc = 0;
112module_param (ignore_oc, bool, S_IRUGO);
113MODULE_PARM_DESC (ignore_oc, "ignore bogus hardware overcurrent indications");
114
Alek Du48f24972010-06-04 15:47:55 +0800115/* for link power management(LPM) feature */
116static unsigned int hird;
117module_param(hird, int, S_IRUGO);
Niels de Voscc556872011-05-31 23:00:10 +0100118MODULE_PARM_DESC(hird, "host initiated resume duration, +1 for each 75us");
Alek Du48f24972010-06-04 15:47:55 +0800119
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120#define INTR_MASK (STS_IAA | STS_FATAL | STS_PCD | STS_ERR | STS_INT)
121
122/*-------------------------------------------------------------------------*/
123
124#include "ehci.h"
125#include "ehci-dbg.c"
Andiry Xuad935622011-03-01 14:57:05 +0800126#include "pci-quirks.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127
128/*-------------------------------------------------------------------------*/
129
Alan Sternbc298472009-02-11 14:26:38 -0500130static void
131timer_action(struct ehci_hcd *ehci, enum ehci_timer_action action)
132{
133 /* Don't override timeouts which shrink or (later) disable
134 * the async ring; just the I/O watchdog. Note that if a
135 * SHRINK were pending, OFF would never be requested.
136 */
137 if (timer_pending(&ehci->watchdog)
138 && ((BIT(TIMER_ASYNC_SHRINK) | BIT(TIMER_ASYNC_OFF))
139 & ehci->actions))
140 return;
141
142 if (!test_and_set_bit(action, &ehci->actions)) {
143 unsigned long t;
144
145 switch (action) {
146 case TIMER_IO_WATCHDOG:
Alek Du403dbd32009-07-13 17:30:41 +0800147 if (!ehci->need_io_watchdog)
148 return;
Alan Sternbc298472009-02-11 14:26:38 -0500149 t = EHCI_IO_JIFFIES;
150 break;
151 case TIMER_ASYNC_OFF:
152 t = EHCI_ASYNC_JIFFIES;
153 break;
154 /* case TIMER_ASYNC_SHRINK: */
155 default:
Alan Stern004c1962011-07-05 12:34:05 -0400156 t = EHCI_SHRINK_JIFFIES;
Alan Sternbc298472009-02-11 14:26:38 -0500157 break;
158 }
159 mod_timer(&ehci->watchdog, t + jiffies);
160 }
161}
162
163/*-------------------------------------------------------------------------*/
164
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165/*
166 * handshake - spin reading hc until handshake completes or fails
167 * @ptr: address of hc register to be read
168 * @mask: bits to look at in result of read
169 * @done: value of those bits when handshake succeeds
170 * @usec: timeout in microseconds
171 *
172 * Returns negative errno, or zero on success
173 *
174 * Success happens when the "mask" bits have the specified value (hardware
175 * handshake done). There are two failure modes: "usec" have passed (major
176 * hardware flakeout), or the register reads as all-ones (hardware removed).
177 *
178 * That last failure should_only happen in cases like physical cardbus eject
179 * before driver shutdown. But it also seems to be caused by bugs in cardbus
180 * bridge shutdown: shutting down the bridge before the devices using it.
181 */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100182static int handshake (struct ehci_hcd *ehci, void __iomem *ptr,
183 u32 mask, u32 done, int usec)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184{
185 u32 result;
186
187 do {
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100188 result = ehci_readl(ehci, ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 if (result == ~(u32)0) /* card removed */
190 return -ENODEV;
191 result &= mask;
192 if (result == done)
193 return 0;
194 udelay (1);
195 usec--;
196 } while (usec > 0);
197 return -ETIMEDOUT;
198}
199
Matthieu CASTET65fd4272010-09-06 18:26:56 +0200200/* check TDI/ARC silicon is in host mode */
201static int tdi_in_host_mode (struct ehci_hcd *ehci)
202{
203 u32 __iomem *reg_ptr;
204 u32 tmp;
205
206 reg_ptr = (u32 __iomem *)(((u8 __iomem *)ehci->regs) + USBMODE);
207 tmp = ehci_readl(ehci, reg_ptr);
208 return (tmp & 3) == USBMODE_CM_HC;
209}
210
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211/* force HC to halt state from unknown (EHCI spec section 2.3) */
212static int ehci_halt (struct ehci_hcd *ehci)
213{
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100214 u32 temp = ehci_readl(ehci, &ehci->regs->status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215
David Brownell72f30b62005-09-27 10:19:39 -0700216 /* disable any irqs left enabled by previous code */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100217 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
David Brownell72f30b62005-09-27 10:19:39 -0700218
Matthieu CASTET65fd4272010-09-06 18:26:56 +0200219 if (ehci_is_TDI(ehci) && tdi_in_host_mode(ehci) == 0) {
220 return 0;
221 }
222
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 if ((temp & STS_HALT) != 0)
224 return 0;
225
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100226 temp = ehci_readl(ehci, &ehci->regs->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 temp &= ~CMD_RUN;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100228 ehci_writel(ehci, temp, &ehci->regs->command);
229 return handshake (ehci, &ehci->regs->status,
230 STS_HALT, STS_HALT, 16 * 125);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231}
232
David Brownell0bcfeb32008-08-26 14:43:46 -0700233static int handshake_on_error_set_halt(struct ehci_hcd *ehci, void __iomem *ptr,
234 u32 mask, u32 done, int usec)
235{
236 int error;
237
238 error = handshake(ehci, ptr, mask, done, usec);
239 if (error) {
240 ehci_halt(ehci);
241 ehci_to_hcd(ehci)->state = HC_STATE_HALT;
Ozan Çağlayan65cb76b2009-10-13 08:37:09 +0300242 ehci_err(ehci, "force halt; handshake %p %08x %08x -> %d\n",
David Brownell0bcfeb32008-08-26 14:43:46 -0700243 ptr, mask, done, error);
244 }
245
246 return error;
247}
248
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249/* put TDI/ARC silicon into EHCI mode */
250static void tdi_reset (struct ehci_hcd *ehci)
251{
252 u32 __iomem *reg_ptr;
253 u32 tmp;
254
Vladimir Barinovd23a1372007-05-23 20:07:48 +0400255 reg_ptr = (u32 __iomem *)(((u8 __iomem *)ehci->regs) + USBMODE);
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100256 tmp = ehci_readl(ehci, reg_ptr);
Vladimir Barinovd23a1372007-05-23 20:07:48 +0400257 tmp |= USBMODE_CM_HC;
258 /* The default byte access to MMR space is LE after
259 * controller reset. Set the required endian mode
260 * for transfer buffers to match the host microprocessor
261 */
262 if (ehci_big_endian_mmio(ehci))
263 tmp |= USBMODE_BE;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100264 ehci_writel(ehci, tmp, reg_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265}
266
267/* reset a non-running (STS_HALT == 1) controller */
268static int ehci_reset (struct ehci_hcd *ehci)
269{
270 int retval;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100271 u32 command = ehci_readl(ehci, &ehci->regs->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
Jason Wessel8d053c72009-08-20 15:39:54 -0500273 /* If the EHCI debug controller is active, special care must be
274 * taken before and after a host controller reset */
275 if (ehci->debug && !dbgp_reset_prep())
276 ehci->debug = NULL;
277
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 command |= CMD_RESET;
279 dbg_cmd (ehci, "reset", command);
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100280 ehci_writel(ehci, command, &ehci->regs->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 ehci_to_hcd(ehci)->state = HC_STATE_HALT;
282 ehci->next_statechange = jiffies;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100283 retval = handshake (ehci, &ehci->regs->command,
284 CMD_RESET, 0, 250 * 1000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285
Alek Du331ac6b2009-07-13 12:41:20 +0800286 if (ehci->has_hostpc) {
287 ehci_writel(ehci, USBMODE_EX_HC | USBMODE_EX_VBPS,
288 (u32 __iomem *)(((u8 *)ehci->regs) + USBMODE_EX));
289 ehci_writel(ehci, TXFIFO_DEFAULT,
290 (u32 __iomem *)(((u8 *)ehci->regs) + TXFILLTUNING));
291 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 if (retval)
293 return retval;
294
295 if (ehci_is_TDI(ehci))
296 tdi_reset (ehci);
297
Jason Wessel8d053c72009-08-20 15:39:54 -0500298 if (ehci->debug)
299 dbgp_external_startup();
300
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 return retval;
302}
303
304/* idle the controller (from running) */
305static void ehci_quiesce (struct ehci_hcd *ehci)
306{
307 u32 temp;
308
309#ifdef DEBUG
310 if (!HC_IS_RUNNING (ehci_to_hcd(ehci)->state))
311 BUG ();
312#endif
313
314 /* wait for any schedule enables/disables to take effect */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100315 temp = ehci_readl(ehci, &ehci->regs->command) << 10;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 temp &= STS_ASS | STS_PSS;
Karsten Wiesec765d4c2008-02-16 13:44:42 -0800317 if (handshake_on_error_set_halt(ehci, &ehci->regs->status,
318 STS_ASS | STS_PSS, temp, 16 * 125))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320
321 /* then disable anything that's still active */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100322 temp = ehci_readl(ehci, &ehci->regs->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 temp &= ~(CMD_ASE | CMD_IAAD | CMD_PSE);
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100324 ehci_writel(ehci, temp, &ehci->regs->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325
326 /* hardware can take 16 microframes to turn off ... */
Karsten Wiesec765d4c2008-02-16 13:44:42 -0800327 handshake_on_error_set_halt(ehci, &ehci->regs->status,
328 STS_ASS | STS_PSS, 0, 16 * 125);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329}
330
331/*-------------------------------------------------------------------------*/
332
Alan Stern07d29b62007-12-11 16:05:30 -0500333static void end_unlink_async(struct ehci_hcd *ehci);
David Howells7d12e782006-10-05 14:55:46 +0100334static void ehci_work(struct ehci_hcd *ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335
336#include "ehci-hub.c"
Alek Du48f24972010-06-04 15:47:55 +0800337#include "ehci-lpm.c"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338#include "ehci-mem.c"
339#include "ehci-q.c"
340#include "ehci-sched.c"
Kirill Smelkov4c670452011-07-03 20:36:56 +0400341#include "ehci-sysfs.c"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
343/*-------------------------------------------------------------------------*/
344
Alan Stern07d29b62007-12-11 16:05:30 -0500345static void ehci_iaa_watchdog(unsigned long param)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346{
347 struct ehci_hcd *ehci = (struct ehci_hcd *) param;
348 unsigned long flags;
349
350 spin_lock_irqsave (&ehci->lock, flags);
351
David Brownelle82cc122008-03-07 13:49:42 -0800352 /* Lost IAA irqs wedge things badly; seen first with a vt8235.
353 * So we need this watchdog, but must protect it against both
354 * (a) SMP races against real IAA firing and retriggering, and
355 * (b) clean HC shutdown, when IAA watchdog was pending.
356 */
357 if (ehci->reclaim
358 && !timer_pending(&ehci->iaa_watchdog)
359 && HC_IS_RUNNING(ehci_to_hcd(ehci)->state)) {
360 u32 cmd, status;
Alan Stern07d29b62007-12-11 16:05:30 -0500361
David Brownelle82cc122008-03-07 13:49:42 -0800362 /* If we get here, IAA is *REALLY* late. It's barely
363 * conceivable that the system is so busy that CMD_IAAD
364 * is still legitimately set, so let's be sure it's
365 * clear before we read STS_IAA. (The HC should clear
366 * CMD_IAAD when it sets STS_IAA.)
367 */
368 cmd = ehci_readl(ehci, &ehci->regs->command);
369 if (cmd & CMD_IAAD)
370 ehci_writel(ehci, cmd & ~CMD_IAAD,
371 &ehci->regs->command);
372
373 /* If IAA is set here it either legitimately triggered
374 * before we cleared IAAD above (but _way_ late, so we'll
375 * still count it as lost) ... or a silicon erratum:
376 * - VIA seems to set IAA without triggering the IRQ;
377 * - IAAD potentially cleared without setting IAA.
378 */
379 status = ehci_readl(ehci, &ehci->regs->status);
380 if ((status & STS_IAA) || !(cmd & CMD_IAAD)) {
Greg Kroah-Hartman64f89792006-10-17 13:57:18 -0700381 COUNT (ehci->stats.lost_iaa);
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100382 ehci_writel(ehci, STS_IAA, &ehci->regs->status);
Greg Kroah-Hartman64f89792006-10-17 13:57:18 -0700383 }
David Brownelle82cc122008-03-07 13:49:42 -0800384
385 ehci_vdbg(ehci, "IAA watchdog: status %x cmd %x\n",
386 status, cmd);
Alan Stern07d29b62007-12-11 16:05:30 -0500387 end_unlink_async(ehci);
Greg Kroah-Hartman64f89792006-10-17 13:57:18 -0700388 }
389
Alan Stern07d29b62007-12-11 16:05:30 -0500390 spin_unlock_irqrestore(&ehci->lock, flags);
391}
392
393static void ehci_watchdog(unsigned long param)
394{
395 struct ehci_hcd *ehci = (struct ehci_hcd *) param;
396 unsigned long flags;
397
398 spin_lock_irqsave(&ehci->lock, flags);
399
400 /* stop async processing after it's idled a bit */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 if (test_bit (TIMER_ASYNC_OFF, &ehci->actions))
David Brownell26f953f2006-09-18 17:03:16 -0700402 start_unlink_async (ehci, ehci->async);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403
404 /* ehci could run by timer, without IRQs ... */
David Howells7d12e782006-10-05 14:55:46 +0100405 ehci_work (ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406
407 spin_unlock_irqrestore (&ehci->lock, flags);
408}
409
Alan Stern89037952007-02-13 14:55:27 -0500410/* On some systems, leaving remote wakeup enabled prevents system shutdown.
411 * The firmware seems to think that powering off is a wakeup event!
412 * This routine turns off remote wakeup and everything else, on all ports.
413 */
414static void ehci_turn_off_all_ports(struct ehci_hcd *ehci)
415{
416 int port = HCS_N_PORTS(ehci->hcs_params);
417
418 while (port--)
419 ehci_writel(ehci, PORT_RWC_BITS,
420 &ehci->regs->port_status[port]);
421}
422
Sarah Sharp21da84a2008-04-08 14:30:18 -0700423/*
424 * Halt HC, turn off all ports, and let the BIOS use the companion controllers.
425 * Should be called with ehci->lock held.
David Brownell72f30b62005-09-27 10:19:39 -0700426 */
Sarah Sharp21da84a2008-04-08 14:30:18 -0700427static void ehci_silence_controller(struct ehci_hcd *ehci)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428{
Sarah Sharp21da84a2008-04-08 14:30:18 -0700429 ehci_halt(ehci);
Alan Stern89037952007-02-13 14:55:27 -0500430 ehci_turn_off_all_ports(ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431
432 /* make BIOS/etc use companion controller during reboot */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100433 ehci_writel(ehci, 0, &ehci->regs->configured_flag);
Alan Stern89037952007-02-13 14:55:27 -0500434
435 /* unblock posted writes */
436 ehci_readl(ehci, &ehci->regs->configured_flag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437}
438
Sarah Sharp21da84a2008-04-08 14:30:18 -0700439/* ehci_shutdown kick in for silicon on any bus (not just pci, etc).
440 * This forcibly disables dma and IRQs, helping kexec and other cases
441 * where the next system software may expect clean state.
442 */
443static void ehci_shutdown(struct usb_hcd *hcd)
444{
445 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
446
447 del_timer_sync(&ehci->watchdog);
448 del_timer_sync(&ehci->iaa_watchdog);
449
450 spin_lock_irq(&ehci->lock);
451 ehci_silence_controller(ehci);
452 spin_unlock_irq(&ehci->lock);
453}
454
David Brownell56c1e262005-04-09 09:00:29 -0700455static void ehci_port_power (struct ehci_hcd *ehci, int is_on)
456{
457 unsigned port;
458
459 if (!HCS_PPC (ehci->hcs_params))
460 return;
461
462 ehci_dbg (ehci, "...power%s ports...\n", is_on ? "up" : "down");
463 for (port = HCS_N_PORTS (ehci->hcs_params); port > 0; )
464 (void) ehci_hub_control(ehci_to_hcd(ehci),
465 is_on ? SetPortFeature : ClearPortFeature,
466 USB_PORT_FEAT_POWER,
467 port--, NULL, 0);
Alan Stern383975d2007-05-04 11:52:40 -0400468 /* Flush those writes */
469 ehci_readl(ehci, &ehci->regs->command);
David Brownell56c1e262005-04-09 09:00:29 -0700470 msleep(20);
471}
472
Matt Porter7ff71d62005-09-22 22:31:15 -0700473/*-------------------------------------------------------------------------*/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474
Matt Porter7ff71d62005-09-22 22:31:15 -0700475/*
476 * ehci_work is called from some interrupts, timers, and so on.
477 * it calls driver completion functions, after dropping ehci->lock.
478 */
David Howells7d12e782006-10-05 14:55:46 +0100479static void ehci_work (struct ehci_hcd *ehci)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480{
Matt Porter7ff71d62005-09-22 22:31:15 -0700481 timer_action_done (ehci, TIMER_IO_WATCHDOG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482
Matt Porter7ff71d62005-09-22 22:31:15 -0700483 /* another CPU may drop ehci->lock during a schedule scan while
484 * it reports urb completions. this flag guards against bogus
485 * attempts at re-entrant schedule scanning.
486 */
487 if (ehci->scanning)
488 return;
489 ehci->scanning = 1;
David Howells7d12e782006-10-05 14:55:46 +0100490 scan_async (ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700491 if (ehci->next_uframe != -1)
David Howells7d12e782006-10-05 14:55:46 +0100492 scan_periodic (ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700493 ehci->scanning = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494
Matt Porter7ff71d62005-09-22 22:31:15 -0700495 /* the IO watchdog guards against hardware or driver bugs that
496 * misplace IRQs, and should let us run completely without IRQs.
497 * such lossage has been observed on both VT6202 and VT8235.
498 */
499 if (HC_IS_RUNNING (ehci_to_hcd(ehci)->state) &&
500 (ehci->async->qh_next.ptr != NULL ||
501 ehci->periodic_sched != 0))
502 timer_action (ehci, TIMER_IO_WATCHDOG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503}
504
Sarah Sharp21da84a2008-04-08 14:30:18 -0700505/*
506 * Called when the ehci_hcd module is removed.
507 */
Matt Porter7ff71d62005-09-22 22:31:15 -0700508static void ehci_stop (struct usb_hcd *hcd)
509{
510 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
511
512 ehci_dbg (ehci, "stop\n");
513
Matt Porter7ff71d62005-09-22 22:31:15 -0700514 /* no more interrupts ... */
515 del_timer_sync (&ehci->watchdog);
Alan Stern07d29b62007-12-11 16:05:30 -0500516 del_timer_sync(&ehci->iaa_watchdog);
Matt Porter7ff71d62005-09-22 22:31:15 -0700517
518 spin_lock_irq(&ehci->lock);
519 if (HC_IS_RUNNING (hcd->state))
520 ehci_quiesce (ehci);
521
Sarah Sharp21da84a2008-04-08 14:30:18 -0700522 ehci_silence_controller(ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700523 ehci_reset (ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700524 spin_unlock_irq(&ehci->lock);
525
Kirill Smelkov4c670452011-07-03 20:36:56 +0400526 remove_sysfs_files(ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700527 remove_debug_files (ehci);
528
529 /* root hub is shut down separately (first, when possible) */
530 spin_lock_irq (&ehci->lock);
531 if (ehci->async)
David Howells7d12e782006-10-05 14:55:46 +0100532 ehci_work (ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700533 spin_unlock_irq (&ehci->lock);
534 ehci_mem_cleanup (ehci);
535
Andiry Xuad935622011-03-01 14:57:05 +0800536 if (ehci->amd_pll_fix == 1)
537 usb_amd_dev_put();
Alex He05570292010-12-07 10:10:08 +0800538
Matt Porter7ff71d62005-09-22 22:31:15 -0700539#ifdef EHCI_STATS
540 ehci_dbg (ehci, "irq normal %ld err %ld reclaim %ld (lost %ld)\n",
541 ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim,
542 ehci->stats.lost_iaa);
543 ehci_dbg (ehci, "complete %ld unlink %ld\n",
544 ehci->stats.complete, ehci->stats.unlink);
545#endif
546
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100547 dbg_status (ehci, "ehci_stop completed",
548 ehci_readl(ehci, &ehci->regs->status));
Matt Porter7ff71d62005-09-22 22:31:15 -0700549}
550
David Brownell18807522005-11-23 15:45:37 -0800551/* one-time init, only for memory state */
552static int ehci_init(struct usb_hcd *hcd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553{
David Brownell18807522005-11-23 15:45:37 -0800554 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 u32 temp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 int retval;
557 u32 hcc_params;
Alek Du3807e262009-07-14 07:23:29 +0800558 struct ehci_qh_hw *hw;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559
David Brownell18807522005-11-23 15:45:37 -0800560 spin_lock_init(&ehci->lock);
561
Alek Du403dbd32009-07-13 17:30:41 +0800562 /*
563 * keep io watchdog by default, those good HCDs could turn off it later
564 */
565 ehci->need_io_watchdog = 1;
David Brownell18807522005-11-23 15:45:37 -0800566 init_timer(&ehci->watchdog);
567 ehci->watchdog.function = ehci_watchdog;
568 ehci->watchdog.data = (unsigned long) ehci;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569
Alan Stern07d29b62007-12-11 16:05:30 -0500570 init_timer(&ehci->iaa_watchdog);
571 ehci->iaa_watchdog.function = ehci_iaa_watchdog;
572 ehci->iaa_watchdog.data = (unsigned long) ehci;
573
Alan Sternf75593c2011-01-06 10:17:09 -0500574 hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params);
575
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 /*
Kirill Smelkovcc62a7e2011-07-03 20:36:57 +0400577 * by default set standard 80% (== 100 usec/uframe) max periodic
578 * bandwidth as required by USB 2.0
579 */
580 ehci->uframe_periodic_max = 100;
581
582 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 * hw default: 1K periodic list heads, one per frame.
584 * periodic_size can shrink by USBCMD update if hcc_params allows.
585 */
586 ehci->periodic_size = DEFAULT_I_TDPS;
Karsten Wiese9aa09d22009-02-08 16:07:58 -0800587 INIT_LIST_HEAD(&ehci->cached_itd_list);
Alan Stern0e5f2312010-04-08 16:56:37 -0400588 INIT_LIST_HEAD(&ehci->cached_sitd_list);
Alan Sternf75593c2011-01-06 10:17:09 -0500589
590 if (HCC_PGM_FRAMELISTLEN(hcc_params)) {
591 /* periodic schedule size can be smaller than default */
592 switch (EHCI_TUNE_FLS) {
593 case 0: ehci->periodic_size = 1024; break;
594 case 1: ehci->periodic_size = 512; break;
595 case 2: ehci->periodic_size = 256; break;
596 default: BUG();
597 }
598 }
David Brownell18807522005-11-23 15:45:37 -0800599 if ((retval = ehci_mem_init(ehci, GFP_KERNEL)) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 return retval;
601
602 /* controllers may cache some of the periodic schedule ... */
David Brownell53bd6a62006-08-30 14:50:06 -0700603 if (HCC_ISOC_CACHE(hcc_params)) // full frame cache
Sarah Sharpdccd5742009-10-27 10:55:05 -0700604 ehci->i_thresh = 2 + 8;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 else // N microframes cached
David Brownell18807522005-11-23 15:45:37 -0800606 ehci->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607
608 ehci->reclaim = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609 ehci->next_uframe = -1;
Karsten Wiese9aa09d22009-02-08 16:07:58 -0800610 ehci->clock_frame = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 /*
613 * dedicate a qh for the async ring head, since we couldn't unlink
614 * a 'real' qh without stopping the async schedule [4.8]. use it
615 * as the 'reclamation list head' too.
616 * its dummy is used in hw_alt_next of many tds, to prevent the qh
617 * from automatically advancing to the next td after short reads.
618 */
David Brownell18807522005-11-23 15:45:37 -0800619 ehci->async->qh_next.qh = NULL;
Alek Du3807e262009-07-14 07:23:29 +0800620 hw = ehci->async->hw;
621 hw->hw_next = QH_NEXT(ehci, ehci->async->qh_dma);
622 hw->hw_info1 = cpu_to_hc32(ehci, QH_HEAD);
623 hw->hw_token = cpu_to_hc32(ehci, QTD_STS_HALT);
624 hw->hw_qtd_next = EHCI_LIST_END(ehci);
David Brownell18807522005-11-23 15:45:37 -0800625 ehci->async->qh_state = QH_STATE_LINKED;
Alek Du3807e262009-07-14 07:23:29 +0800626 hw->hw_alt_next = QTD_NEXT(ehci, ehci->async->dummy->qtd_dma);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627
628 /* clear interrupt enables, set irq latency */
629 if (log2_irq_thresh < 0 || log2_irq_thresh > 6)
630 log2_irq_thresh = 0;
631 temp = 1 << (16 + log2_irq_thresh);
Alek Du5a9cdf32010-06-04 15:47:56 +0800632 if (HCC_PER_PORT_CHANGE_EVENT(hcc_params)) {
633 ehci->has_ppcd = 1;
634 ehci_dbg(ehci, "enable per-port change event\n");
635 temp |= CMD_PPCEE;
636 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637 if (HCC_CANPARK(hcc_params)) {
638 /* HW default park == 3, on hardware that supports it (like
639 * NVidia and ALI silicon), maximizes throughput on the async
640 * schedule by avoiding QH fetches between transfers.
641 *
642 * With fast usb storage devices and NForce2, "park" seems to
643 * make problems: throughput reduction (!), data errors...
644 */
645 if (park) {
David Brownell18807522005-11-23 15:45:37 -0800646 park = min(park, (unsigned) 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 temp |= CMD_PARK;
648 temp |= park << 8;
649 }
David Brownell18807522005-11-23 15:45:37 -0800650 ehci_dbg(ehci, "park %d\n", park);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 }
David Brownell18807522005-11-23 15:45:37 -0800652 if (HCC_PGM_FRAMELISTLEN(hcc_params)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653 /* periodic schedule size can be smaller than default */
654 temp &= ~(3 << 2);
655 temp |= (EHCI_TUNE_FLS << 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 }
Alek Du48f24972010-06-04 15:47:55 +0800657 if (HCC_LPM(hcc_params)) {
658 /* support link power management EHCI 1.1 addendum */
659 ehci_dbg(ehci, "support lpm\n");
660 ehci->has_lpm = 1;
661 if (hird > 0xf) {
662 ehci_dbg(ehci, "hird %d invalid, use default 0",
663 hird);
664 hird = 0;
665 }
666 temp |= hird << 24;
667 }
David Brownell18807522005-11-23 15:45:37 -0800668 ehci->command = temp;
669
Alan Stern40f8db82009-11-06 12:29:40 -0500670 /* Accept arbitrarily long scatter-gather lists */
Andrea Righi4307a282010-06-28 16:56:45 +0200671 if (!(hcd->driver->flags & HCD_LOCAL_MEM))
672 hcd->self.sg_tablesize = ~0;
David Brownell18807522005-11-23 15:45:37 -0800673 return 0;
674}
675
676/* start HC running; it's halted, ehci_init() has been run (once) */
677static int ehci_run (struct usb_hcd *hcd)
678{
679 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
680 int retval;
681 u32 temp;
682 u32 hcc_params;
683
Marcelo Tosatti1d619f12007-01-21 19:45:59 -0200684 hcd->uses_new_polling = 1;
Marcelo Tosatti1d619f12007-01-21 19:45:59 -0200685
David Brownell18807522005-11-23 15:45:37 -0800686 /* EHCI spec section 4.1 */
Matthieu CASTETbcf40812011-02-15 18:40:28 +0100687 /*
688 * TDI driver does the ehci_reset in their reset callback.
689 * Don't reset here, because configuration settings will
690 * vanish.
691 */
692 if (!ehci_is_TDI(ehci) && (retval = ehci_reset(ehci)) != 0) {
David Brownell18807522005-11-23 15:45:37 -0800693 ehci_mem_cleanup(ehci);
694 return retval;
695 }
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100696 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
697 ehci_writel(ehci, (u32)ehci->async->qh_dma, &ehci->regs->async_next);
David Brownell18807522005-11-23 15:45:37 -0800698
699 /*
700 * hcc_params controls whether ehci->regs->segment must (!!!)
701 * be used; it constrains QH/ITD/SITD and QTD locations.
702 * pci_pool consistent memory always uses segment zero.
703 * streaming mappings for I/O buffers, like pci_map_single(),
704 * can return segments above 4GB, if the device allows.
705 *
706 * NOTE: the dma mask is visible through dma_supported(), so
707 * drivers can pass this info along ... like NETIF_F_HIGHDMA,
708 * Scsi_Host.highmem_io, and so forth. It's readonly to all
709 * host side drivers though.
710 */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100711 hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params);
David Brownell18807522005-11-23 15:45:37 -0800712 if (HCC_64BIT_ADDR(hcc_params)) {
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100713 ehci_writel(ehci, 0, &ehci->regs->segment);
David Brownell18807522005-11-23 15:45:37 -0800714#if 0
715// this is deeply broken on almost all architectures
Yang Hongyang6a355282009-04-06 19:01:13 -0700716 if (!dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64)))
David Brownell18807522005-11-23 15:45:37 -0800717 ehci_info(ehci, "enabled 64bit DMA\n");
718#endif
719 }
720
721
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 // Philips, Intel, and maybe others need CMD_RUN before the
723 // root hub will detect new devices (why?); NEC doesn't
David Brownell18807522005-11-23 15:45:37 -0800724 ehci->command &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET);
725 ehci->command |= CMD_RUN;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100726 ehci_writel(ehci, ehci->command, &ehci->regs->command);
David Brownell18807522005-11-23 15:45:37 -0800727 dbg_cmd (ehci, "init", ehci->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 /*
730 * Start, enabling full USB 2.0 functionality ... usb 1.1 devices
731 * are explicitly handed to companion controller(s), so no TT is
732 * involved with the root hub. (Except where one is integrated,
733 * and there's no companion controller unless maybe for USB OTG.)
Alan Stern32fe0192007-10-10 16:27:07 -0400734 *
735 * Turning on the CF flag will transfer ownership of all ports
736 * from the companions to the EHCI controller. If any of the
737 * companions are in the middle of a port reset at the time, it
738 * could cause trouble. Write-locking ehci_cf_port_reset_rwsem
David Brownell1cb52652007-11-13 16:22:30 -0800739 * guarantees that no resets are in progress. After we set CF,
740 * a short delay lets the hardware catch up; new resets shouldn't
741 * be started before the port switching actions could complete.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 */
Alan Stern32fe0192007-10-10 16:27:07 -0400743 down_write(&ehci_cf_port_reset_rwsem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744 hcd->state = HC_STATE_RUNNING;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100745 ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
746 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
David Brownell1cb52652007-11-13 16:22:30 -0800747 msleep(5);
Alan Stern32fe0192007-10-10 16:27:07 -0400748 up_write(&ehci_cf_port_reset_rwsem);
Oliver Neukumee4ecb82009-11-27 15:17:59 +0100749 ehci->last_periodic_enable = ktime_get_real();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750
Jan Anderssonc4301312011-05-03 20:11:57 +0200751 temp = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 ehci_info (ehci,
Alan Stern2b70f072008-10-02 11:47:15 -0400753 "USB %x.%x started, EHCI %x.%02x%s\n",
Matt Porter7ff71d62005-09-22 22:31:15 -0700754 ((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f),
Alan Stern2b70f072008-10-02 11:47:15 -0400755 temp >> 8, temp & 0xff,
David Brownell93f1a472006-11-16 23:34:58 -0800756 ignore_oc ? ", overcurrent ignored" : "");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100758 ehci_writel(ehci, INTR_MASK,
759 &ehci->regs->intr_enable); /* Turn On Interrupts */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760
David Brownell18807522005-11-23 15:45:37 -0800761 /* GRR this is run-once init(), being done every time the HC starts.
762 * So long as they're part of class devices, we can't do it init()
763 * since the class device isn't created that early.
764 */
765 create_debug_files(ehci);
Kirill Smelkov4c670452011-07-03 20:36:56 +0400766 create_sysfs_files(ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767
768 return 0;
769}
770
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771/*-------------------------------------------------------------------------*/
772
David Howells7d12e782006-10-05 14:55:46 +0100773static irqreturn_t ehci_irq (struct usb_hcd *hcd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774{
775 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
Alan Stern67b2e022008-11-12 17:04:53 -0500776 u32 status, masked_status, pcd_status = 0, cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 int bh;
778
779 spin_lock (&ehci->lock);
780
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100781 status = ehci_readl(ehci, &ehci->regs->status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782
783 /* e.g. cardbus physical eject */
784 if (status == ~(u32) 0) {
785 ehci_dbg (ehci, "device removed\n");
786 goto dead;
787 }
788
Alan Stern69fff592011-05-17 17:27:12 -0400789 /* Shared IRQ? */
Alan Stern67b2e022008-11-12 17:04:53 -0500790 masked_status = status & INTR_MASK;
Alan Stern69fff592011-05-17 17:27:12 -0400791 if (!masked_status || unlikely(hcd->state == HC_STATE_HALT)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792 spin_unlock(&ehci->lock);
793 return IRQ_NONE;
794 }
795
796 /* clear (just) interrupts */
Alan Stern67b2e022008-11-12 17:04:53 -0500797 ehci_writel(ehci, masked_status, &ehci->regs->status);
David Brownelle82cc122008-03-07 13:49:42 -0800798 cmd = ehci_readl(ehci, &ehci->regs->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 bh = 0;
800
David Brownell9776afc2008-02-01 11:42:05 -0800801#ifdef VERBOSE_DEBUG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 /* unrequested/ignored: Frame List Rollover */
803 dbg_status (ehci, "irq", status);
804#endif
805
806 /* INT, ERR, and IAA interrupt rates can be throttled */
807
808 /* normal [4.15.1.2] or error [4.15.1.1] completion */
809 if (likely ((status & (STS_INT|STS_ERR)) != 0)) {
810 if (likely ((status & STS_ERR) == 0))
811 COUNT (ehci->stats.normal);
812 else
813 COUNT (ehci->stats.error);
814 bh = 1;
815 }
816
817 /* complete the unlinking of some qh [4.15.2.3] */
818 if (status & STS_IAA) {
David Brownelle82cc122008-03-07 13:49:42 -0800819 /* guard against (alleged) silicon errata */
820 if (cmd & CMD_IAAD) {
821 ehci_writel(ehci, cmd & ~CMD_IAAD,
822 &ehci->regs->command);
823 ehci_dbg(ehci, "IAA with IAAD still set?\n");
824 }
825 if (ehci->reclaim) {
826 COUNT(ehci->stats.reclaim);
827 end_unlink_async(ehci);
828 } else
829 ehci_dbg(ehci, "IAA with nothing to reclaim?\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830 }
831
832 /* remote wakeup [4.3.1] */
David Brownelld97cc2f2005-12-22 17:05:18 -0800833 if (status & STS_PCD) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 unsigned i = HCS_N_PORTS (ehci->hcs_params);
Alek Du5a9cdf32010-06-04 15:47:56 +0800835 u32 ppcd = 0;
David Brownelld1b18422008-03-05 23:37:52 -0800836
837 /* kick root hub later */
Marcelo Tosatti1d619f12007-01-21 19:45:59 -0200838 pcd_status = status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839
840 /* resume root hub? */
Alan Sterneafe5b92008-10-06 11:25:53 -0400841 if (!(cmd & CMD_RUN))
Alan Stern8c033562006-11-09 14:42:16 -0500842 usb_hcd_resume_root_hub(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843
Alek Du5a9cdf32010-06-04 15:47:56 +0800844 /* get per-port change detect bits */
845 if (ehci->has_ppcd)
846 ppcd = status >> 16;
847
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 while (i--) {
Alek Du5a9cdf32010-06-04 15:47:56 +0800849 int pstatus;
850
851 /* leverage per-port change bits feature */
852 if (ehci->has_ppcd && !(ppcd & (1 << i)))
853 continue;
854 pstatus = ehci_readl(ehci,
855 &ehci->regs->port_status[i]);
David Brownellb972b682006-06-30 02:34:42 -0700856
857 if (pstatus & PORT_OWNER)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858 continue;
Alan Sterneafe5b92008-10-06 11:25:53 -0400859 if (!(test_bit(i, &ehci->suspended_ports) &&
860 ((pstatus & PORT_RESUME) ||
861 !(pstatus & PORT_SUSPEND)) &&
862 (pstatus & PORT_PE) &&
863 ehci->reset_done[i] == 0))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 continue;
865
866 /* start 20 msec resume signaling from this port,
867 * and make khubd collect PORT_STAT_C_SUSPEND to
Alan Stern49d0f072010-01-08 11:18:38 -0500868 * stop that signaling. Use 5 ms extra for safety,
869 * like usb_port_resume() does.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870 */
Alan Stern49d0f072010-01-08 11:18:38 -0500871 ehci->reset_done[i] = jiffies + msecs_to_jiffies(25);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872 ehci_dbg (ehci, "port %d remote wakeup\n", i + 1);
Alan Stern61e8b852007-04-09 11:52:31 -0400873 mod_timer(&hcd->rh_timer, ehci->reset_done[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874 }
875 }
876
877 /* PCI errors [4.15.2.4] */
878 if (unlikely ((status & STS_FATAL) != 0)) {
Alan Stern67b2e022008-11-12 17:04:53 -0500879 ehci_err(ehci, "fatal error\n");
Alan Sterneafe5b92008-10-06 11:25:53 -0400880 dbg_cmd(ehci, "fatal", cmd);
881 dbg_status(ehci, "fatal", status);
Alan Stern67b2e022008-11-12 17:04:53 -0500882 ehci_halt(ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883dead:
Alan Stern67b2e022008-11-12 17:04:53 -0500884 ehci_reset(ehci);
885 ehci_writel(ehci, 0, &ehci->regs->configured_flag);
Alan Stern69fff592011-05-17 17:27:12 -0400886 usb_hc_died(hcd);
Alan Stern67b2e022008-11-12 17:04:53 -0500887 /* generic layer kills/unlinks all urbs, then
888 * uses ehci_stop to clean up the rest
889 */
890 bh = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891 }
892
893 if (bh)
David Howells7d12e782006-10-05 14:55:46 +0100894 ehci_work (ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895 spin_unlock (&ehci->lock);
David Brownelld1b18422008-03-05 23:37:52 -0800896 if (pcd_status)
Marcelo Tosatti1d619f12007-01-21 19:45:59 -0200897 usb_hcd_poll_rh_status(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898 return IRQ_HANDLED;
899}
900
901/*-------------------------------------------------------------------------*/
902
903/*
904 * non-error returns are a promise to giveback() the urb later
905 * we drop ownership so next owner (or urb unlink) can get it
906 *
907 * urb + dev is in hcd.self.controller.urb_list
908 * we're queueing TDs onto software and hardware lists
909 *
910 * hcd-specific init for hcpriv hasn't been done yet
911 *
912 * NOTE: control, bulk, and interrupt share the same code to append TDs
913 * to a (possibly active) QH, and the same QH scanning code.
914 */
915static int ehci_urb_enqueue (
916 struct usb_hcd *hcd,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 struct urb *urb,
Al Viro55016f12005-10-21 03:21:58 -0400918 gfp_t mem_flags
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919) {
920 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
921 struct list_head qtd_list;
922
923 INIT_LIST_HEAD (&qtd_list);
924
925 switch (usb_pipetype (urb->pipe)) {
David Brownell25b70a82008-03-04 15:11:07 -0800926 case PIPE_CONTROL:
927 /* qh_completions() code doesn't handle all the fault cases
928 * in multi-TD control transfers. Even 1KB is rare anyway.
929 */
930 if (urb->transfer_buffer_length > (16 * 1024))
931 return -EMSGSIZE;
932 /* FALLTHROUGH */
933 /* case PIPE_BULK: */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934 default:
935 if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags))
936 return -ENOMEM;
Alan Sterne9df41c2007-08-08 11:48:02 -0400937 return submit_async(ehci, urb, &qtd_list, mem_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938
939 case PIPE_INTERRUPT:
940 if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags))
941 return -ENOMEM;
Alan Sterne9df41c2007-08-08 11:48:02 -0400942 return intr_submit(ehci, urb, &qtd_list, mem_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943
944 case PIPE_ISOCHRONOUS:
945 if (urb->dev->speed == USB_SPEED_HIGH)
946 return itd_submit (ehci, urb, mem_flags);
947 else
948 return sitd_submit (ehci, urb, mem_flags);
949 }
950}
951
952static void unlink_async (struct ehci_hcd *ehci, struct ehci_qh *qh)
953{
Alan Stern07d29b62007-12-11 16:05:30 -0500954 /* failfast */
David Brownelle82cc122008-03-07 13:49:42 -0800955 if (!HC_IS_RUNNING(ehci_to_hcd(ehci)->state) && ehci->reclaim)
Alan Stern07d29b62007-12-11 16:05:30 -0500956 end_unlink_async(ehci);
957
Alan Stern3a444942009-08-19 12:22:06 -0400958 /* If the QH isn't linked then there's nothing we can do
959 * unless we were called during a giveback, in which case
960 * qh_completions() has to deal with it.
961 */
962 if (qh->qh_state != QH_STATE_LINKED) {
963 if (qh->qh_state == QH_STATE_COMPLETING)
964 qh->needs_rescan = 1;
965 return;
966 }
Alan Stern07d29b62007-12-11 16:05:30 -0500967
968 /* defer till later if busy */
Alan Stern3a444942009-08-19 12:22:06 -0400969 if (ehci->reclaim) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970 struct ehci_qh *last;
971
972 for (last = ehci->reclaim;
973 last->reclaim;
974 last = last->reclaim)
975 continue;
976 qh->qh_state = QH_STATE_UNLINK_WAIT;
977 last->reclaim = qh;
978
Alan Stern07d29b62007-12-11 16:05:30 -0500979 /* start IAA cycle */
980 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981 start_unlink_async (ehci, qh);
982}
983
984/* remove from hardware lists
985 * completions normally happen asynchronously
986 */
987
Alan Sterne9df41c2007-08-08 11:48:02 -0400988static int ehci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989{
990 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
991 struct ehci_qh *qh;
992 unsigned long flags;
Alan Sterne9df41c2007-08-08 11:48:02 -0400993 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994
995 spin_lock_irqsave (&ehci->lock, flags);
Alan Sterne9df41c2007-08-08 11:48:02 -0400996 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
997 if (rc)
998 goto done;
999
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000 switch (usb_pipetype (urb->pipe)) {
1001 // case PIPE_CONTROL:
1002 // case PIPE_BULK:
1003 default:
1004 qh = (struct ehci_qh *) urb->hcpriv;
1005 if (!qh)
1006 break;
Alan Stern07d29b62007-12-11 16:05:30 -05001007 switch (qh->qh_state) {
1008 case QH_STATE_LINKED:
1009 case QH_STATE_COMPLETING:
1010 unlink_async(ehci, qh);
1011 break;
1012 case QH_STATE_UNLINK:
1013 case QH_STATE_UNLINK_WAIT:
1014 /* already started */
1015 break;
1016 case QH_STATE_IDLE:
Alan Stern7a0f0d92009-07-31 10:40:22 -04001017 /* QH might be waiting for a Clear-TT-Buffer */
1018 qh_completions(ehci, qh);
Alan Stern07d29b62007-12-11 16:05:30 -05001019 break;
1020 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 break;
1022
1023 case PIPE_INTERRUPT:
1024 qh = (struct ehci_qh *) urb->hcpriv;
1025 if (!qh)
1026 break;
1027 switch (qh->qh_state) {
1028 case QH_STATE_LINKED:
Alan Sterna448c9d2009-08-19 12:22:44 -04001029 case QH_STATE_COMPLETING:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030 intr_deschedule (ehci, qh);
Alan Sterna448c9d2009-08-19 12:22:44 -04001031 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032 case QH_STATE_IDLE:
David Howells7d12e782006-10-05 14:55:46 +01001033 qh_completions (ehci, qh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034 break;
1035 default:
1036 ehci_dbg (ehci, "bogus qh %p state %d\n",
1037 qh, qh->qh_state);
1038 goto done;
1039 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 break;
1041
1042 case PIPE_ISOCHRONOUS:
1043 // itd or sitd ...
1044
1045 // wait till next completion, do it then.
1046 // completion irqs can wait up to 1024 msec,
1047 break;
1048 }
1049done:
1050 spin_unlock_irqrestore (&ehci->lock, flags);
Alan Sterne9df41c2007-08-08 11:48:02 -04001051 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052}
1053
1054/*-------------------------------------------------------------------------*/
1055
1056// bulk qh holds the data toggle
1057
1058static void
1059ehci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep)
1060{
1061 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
1062 unsigned long flags;
1063 struct ehci_qh *qh, *tmp;
1064
1065 /* ASSERT: any requests/urbs are being unlinked */
1066 /* ASSERT: nobody can be submitting urbs for this any more */
1067
1068rescan:
1069 spin_lock_irqsave (&ehci->lock, flags);
1070 qh = ep->hcpriv;
1071 if (!qh)
1072 goto done;
1073
1074 /* endpoints can be iso streams. for now, we don't
1075 * accelerate iso completions ... so spin a while.
1076 */
Clemens Ladisch1082f572010-03-01 17:18:56 +01001077 if (qh->hw == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078 ehci_vdbg (ehci, "iso delay\n");
1079 goto idle_timeout;
1080 }
1081
1082 if (!HC_IS_RUNNING (hcd->state))
1083 qh->qh_state = QH_STATE_IDLE;
1084 switch (qh->qh_state) {
1085 case QH_STATE_LINKED:
Alan Stern3a444942009-08-19 12:22:06 -04001086 case QH_STATE_COMPLETING:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087 for (tmp = ehci->async->qh_next.qh;
1088 tmp && tmp != qh;
1089 tmp = tmp->qh_next.qh)
1090 continue;
Alan Stern02e2c512010-11-16 10:57:37 -05001091 /* periodic qh self-unlinks on empty, and a COMPLETING qh
1092 * may already be unlinked.
1093 */
1094 if (tmp)
1095 unlink_async(ehci, qh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096 /* FALL THROUGH */
1097 case QH_STATE_UNLINK: /* wait for hw to finish? */
Alan Stern07d29b62007-12-11 16:05:30 -05001098 case QH_STATE_UNLINK_WAIT:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099idle_timeout:
1100 spin_unlock_irqrestore (&ehci->lock, flags);
Nishanth Aravamudan22c43862005-08-15 11:30:11 -07001101 schedule_timeout_uninterruptible(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102 goto rescan;
1103 case QH_STATE_IDLE: /* fully unlinked */
Alan Stern914b7012009-06-29 10:47:30 -04001104 if (qh->clearing_tt)
1105 goto idle_timeout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106 if (list_empty (&qh->qtd_list)) {
1107 qh_put (qh);
1108 break;
1109 }
1110 /* else FALL THROUGH */
1111 default:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112 /* caller was supposed to have unlinked any requests;
1113 * that's not our job. just leak this memory.
1114 */
1115 ehci_err (ehci, "qh %p (#%02x) state %d%s\n",
1116 qh, ep->desc.bEndpointAddress, qh->qh_state,
1117 list_empty (&qh->qtd_list) ? "" : "(has tds)");
1118 break;
1119 }
1120 ep->hcpriv = NULL;
1121done:
1122 spin_unlock_irqrestore (&ehci->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123}
1124
Alan Sternb18ffd42009-05-27 18:21:56 -04001125static void
1126ehci_endpoint_reset(struct usb_hcd *hcd, struct usb_host_endpoint *ep)
1127{
1128 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1129 struct ehci_qh *qh;
1130 int eptype = usb_endpoint_type(&ep->desc);
Alan Sterna455212d2009-06-11 14:56:22 -04001131 int epnum = usb_endpoint_num(&ep->desc);
1132 int is_out = usb_endpoint_dir_out(&ep->desc);
1133 unsigned long flags;
Alan Sternb18ffd42009-05-27 18:21:56 -04001134
1135 if (eptype != USB_ENDPOINT_XFER_BULK && eptype != USB_ENDPOINT_XFER_INT)
1136 return;
1137
Alan Sterna455212d2009-06-11 14:56:22 -04001138 spin_lock_irqsave(&ehci->lock, flags);
Alan Sternb18ffd42009-05-27 18:21:56 -04001139 qh = ep->hcpriv;
1140
1141 /* For Bulk and Interrupt endpoints we maintain the toggle state
1142 * in the hardware; the toggle bits in udev aren't used at all.
1143 * When an endpoint is reset by usb_clear_halt() we must reset
1144 * the toggle bit in the QH.
1145 */
1146 if (qh) {
Alan Sterna455212d2009-06-11 14:56:22 -04001147 usb_settoggle(qh->dev, epnum, is_out, 0);
Alan Sternb18ffd42009-05-27 18:21:56 -04001148 if (!list_empty(&qh->qtd_list)) {
1149 WARN_ONCE(1, "clear_halt for a busy endpoint\n");
Alan Stern3a444942009-08-19 12:22:06 -04001150 } else if (qh->qh_state == QH_STATE_LINKED ||
1151 qh->qh_state == QH_STATE_COMPLETING) {
Alan Sterna455212d2009-06-11 14:56:22 -04001152
1153 /* The toggle value in the QH can't be updated
1154 * while the QH is active. Unlink it now;
1155 * re-linking will call qh_refresh().
Alan Sternb18ffd42009-05-27 18:21:56 -04001156 */
Alan Sterna448c9d2009-08-19 12:22:44 -04001157 if (eptype == USB_ENDPOINT_XFER_BULK)
Alan Sterna455212d2009-06-11 14:56:22 -04001158 unlink_async(ehci, qh);
Alan Sterna448c9d2009-08-19 12:22:44 -04001159 else
Alan Sterna455212d2009-06-11 14:56:22 -04001160 intr_deschedule(ehci, qh);
Alan Sternb18ffd42009-05-27 18:21:56 -04001161 }
1162 }
Alan Sterna455212d2009-06-11 14:56:22 -04001163 spin_unlock_irqrestore(&ehci->lock, flags);
Alan Sternb18ffd42009-05-27 18:21:56 -04001164}
1165
Matt Porter7ff71d62005-09-22 22:31:15 -07001166static int ehci_get_frame (struct usb_hcd *hcd)
1167{
1168 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +11001169 return (ehci_readl(ehci, &ehci->regs->frame_index) >> 3) %
1170 ehci->periodic_size;
Matt Porter7ff71d62005-09-22 22:31:15 -07001171}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172
1173/*-------------------------------------------------------------------------*/
1174
Alan Stern2b70f072008-10-02 11:47:15 -04001175MODULE_DESCRIPTION(DRIVER_DESC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176MODULE_AUTHOR (DRIVER_AUTHOR);
1177MODULE_LICENSE ("GPL");
1178
Matt Porter7ff71d62005-09-22 22:31:15 -07001179#ifdef CONFIG_PCI
1180#include "ehci-pci.c"
Kumar Gala01cced22006-04-11 10:07:16 -05001181#define PCI_DRIVER ehci_pci_driver
Matt Porter7ff71d62005-09-22 22:31:15 -07001182#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183
Li Yangba029782007-05-11 17:09:55 +08001184#ifdef CONFIG_USB_EHCI_FSL
Randy Vinson80cb9ae2006-01-20 13:53:38 -08001185#include "ehci-fsl.c"
Kumar Gala01cced22006-04-11 10:07:16 -05001186#define PLATFORM_DRIVER ehci_fsl_driver
Randy Vinson80cb9ae2006-01-20 13:53:38 -08001187#endif
1188
Daniel Mack7e8d5cd2009-10-28 01:14:59 +01001189#ifdef CONFIG_USB_EHCI_MXC
1190#include "ehci-mxc.c"
1191#define PLATFORM_DRIVER ehci_mxc_driver
1192#endif
1193
Yoshihiro Shimoda60b0bf02011-03-01 16:58:37 +09001194#ifdef CONFIG_USB_EHCI_SH
Paul Mundt63c84552010-11-01 17:03:27 -04001195#include "ehci-sh.c"
1196#define PLATFORM_DRIVER ehci_hcd_sh_driver
1197#endif
1198
Ralf Baechledfbaa7d2006-06-03 23:58:55 +01001199#ifdef CONFIG_SOC_AU1200
Jordan Crouse76fa9a22006-01-20 14:06:09 -08001200#include "ehci-au1xxx.c"
Kumar Gala01cced22006-04-11 10:07:16 -05001201#define PLATFORM_DRIVER ehci_hcd_au1xxx_driver
Jordan Crouse76fa9a22006-01-20 14:06:09 -08001202#endif
1203
Keshava Munegowda7f124f42010-11-21 23:23:41 +05301204#ifdef CONFIG_USB_EHCI_HCD_OMAP
Felipe Balbi54ab2b02009-10-14 11:44:14 +03001205#include "ehci-omap.c"
1206#define PLATFORM_DRIVER ehci_hcd_omap_driver
1207#endif
1208
Geoff Levandad75a412007-01-15 20:11:47 -08001209#ifdef CONFIG_PPC_PS3
1210#include "ehci-ps3.c"
Geoff Levand7a4eb7f2007-06-05 20:04:35 -07001211#define PS3_SYSTEM_BUS_DRIVER ps3_ehci_driver
Geoff Levandad75a412007-01-15 20:11:47 -08001212#endif
1213
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001214#ifdef CONFIG_USB_EHCI_HCD_PPC_OF
1215#include "ehci-ppc-of.c"
1216#define OF_PLATFORM_DRIVER ehci_hcd_ppc_of_driver
1217#endif
1218
Julie Zhu08d3c182009-09-21 16:08:19 -06001219#ifdef CONFIG_XPS_USB_HCD_XILINX
1220#include "ehci-xilinx-of.c"
Grant Likely1f23b2d2010-06-02 13:53:17 -06001221#define XILINX_OF_PLATFORM_DRIVER ehci_hcd_xilinx_of_driver
Julie Zhu08d3c182009-09-21 16:08:19 -06001222#endif
1223
Lennert Buytenhek705a7522008-03-27 14:51:40 -04001224#ifdef CONFIG_PLAT_ORION
Tzachi Perelsteine96ffe22007-12-01 11:07:04 -05001225#include "ehci-orion.c"
1226#define PLATFORM_DRIVER ehci_orion_driver
1227#endif
1228
Vladimir Barinov91bc4d32007-12-30 15:21:11 -08001229#ifdef CONFIG_ARCH_IXP4XX
1230#include "ehci-ixp4xx.c"
1231#define PLATFORM_DRIVER ixp4xx_ehci_driver
1232#endif
1233
Wan ZongShun586dfc82009-06-13 09:14:28 +08001234#ifdef CONFIG_USB_W90X900_EHCI
1235#include "ehci-w90x900.c"
1236#define PLATFORM_DRIVER ehci_hcd_w90x900_driver
1237#endif
1238
Nicolas Ferre501c9c02009-07-27 14:47:40 -07001239#ifdef CONFIG_ARCH_AT91
1240#include "ehci-atmel.c"
1241#define PLATFORM_DRIVER ehci_atmel_driver
1242#endif
1243
David Daney1643acc2010-10-08 14:47:52 -07001244#ifdef CONFIG_USB_OCTEON_EHCI
1245#include "ehci-octeon.c"
1246#define PLATFORM_DRIVER ehci_octeon_driver
1247#endif
1248
Mac Lin760efe62010-11-25 23:58:00 +08001249#ifdef CONFIG_USB_CNS3XXX_EHCI
1250#include "ehci-cns3xxx.c"
1251#define PLATFORM_DRIVER cns3xxx_ehci_driver
1252#endif
1253
Alexey Charkovad78aca2010-11-07 19:28:55 +03001254#ifdef CONFIG_ARCH_VT8500
1255#include "ehci-vt8500.c"
1256#define PLATFORM_DRIVER vt8500_ehci_driver
1257#endif
1258
Deepak Sikric8c38de2010-11-10 14:33:18 +05301259#ifdef CONFIG_PLAT_SPEAR
1260#include "ehci-spear.c"
1261#define PLATFORM_DRIVER spear_ehci_hcd_driver
1262#endif
1263
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +05301264#ifdef CONFIG_USB_EHCI_MSM
1265#include "ehci-msm.c"
1266#define PLATFORM_DRIVER ehci_msm_driver
1267#endif
1268
Anoop22ced6872011-02-24 19:26:28 +05301269#ifdef CONFIG_USB_EHCI_HCD_PMC_MSP
1270#include "ehci-pmcmsp.c"
1271#define PLATFORM_DRIVER ehci_hcd_msp_driver
1272#endif
1273
Benoit Goby79ad3b52011-03-09 16:28:56 -08001274#ifdef CONFIG_USB_EHCI_TEGRA
1275#include "ehci-tegra.c"
1276#define PLATFORM_DRIVER tegra_ehci_driver
1277#endif
1278
Joonyoung Shim1bcc5aa2011-04-08 14:08:50 +09001279#ifdef CONFIG_USB_EHCI_S5P
1280#include "ehci-s5p.c"
1281#define PLATFORM_DRIVER s5p_ehci_driver
1282#endif
1283
Gabor Juhos502fa842011-04-13 10:54:22 +02001284#ifdef CONFIG_USB_EHCI_ATH79
1285#include "ehci-ath79.c"
1286#define PLATFORM_DRIVER ehci_ath79_driver
1287#endif
1288
Jan Andersson9be03922011-05-03 20:11:58 +02001289#ifdef CONFIG_SPARC_LEON
1290#include "ehci-grlib.c"
1291#define PLATFORM_DRIVER ehci_grlib_driver
1292#endif
1293
Tanmay Upadhyay3abd7f62011-07-20 10:00:58 +05301294#ifdef CONFIG_USB_PXA168_EHCI
1295#include "ehci-pxa168.c"
1296#define PLATFORM_DRIVER ehci_pxa168_driver
1297#endif
1298
Geoff Levandad75a412007-01-15 20:11:47 -08001299#if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
Grant Likely1f23b2d2010-06-02 13:53:17 -06001300 !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
1301 !defined(XILINX_OF_PLATFORM_DRIVER)
Matt Porter7ff71d62005-09-22 22:31:15 -07001302#error "missing bus glue for ehci-hcd"
1303#endif
Kumar Gala01cced22006-04-11 10:07:16 -05001304
1305static int __init ehci_hcd_init(void)
1306{
1307 int retval = 0;
1308
Alan Stern2b70f072008-10-02 11:47:15 -04001309 if (usb_disabled())
1310 return -ENODEV;
1311
1312 printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name);
Alan Stern9beeee62008-10-02 11:48:13 -04001313 set_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
1314 if (test_bit(USB_UHCI_LOADED, &usb_hcds_loaded) ||
1315 test_bit(USB_OHCI_LOADED, &usb_hcds_loaded))
1316 printk(KERN_WARNING "Warning! ehci_hcd should always be loaded"
1317 " before uhci_hcd and ohci_hcd, not after\n");
1318
Kumar Gala01cced22006-04-11 10:07:16 -05001319 pr_debug("%s: block sizes: qh %Zd qtd %Zd itd %Zd sitd %Zd\n",
1320 hcd_name,
1321 sizeof(struct ehci_qh), sizeof(struct ehci_qtd),
1322 sizeof(struct ehci_itd), sizeof(struct ehci_sitd));
1323
Tony Jones694cc202007-09-11 14:07:31 -07001324#ifdef DEBUG
Greg Kroah-Hartman08f4e582009-04-24 15:13:18 -07001325 ehci_debug_root = debugfs_create_dir("ehci", usb_debug_root);
Alan Stern9beeee62008-10-02 11:48:13 -04001326 if (!ehci_debug_root) {
1327 retval = -ENOENT;
1328 goto err_debug;
1329 }
Tony Jones694cc202007-09-11 14:07:31 -07001330#endif
1331
Kumar Gala01cced22006-04-11 10:07:16 -05001332#ifdef PLATFORM_DRIVER
1333 retval = platform_driver_register(&PLATFORM_DRIVER);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001334 if (retval < 0)
1335 goto clean0;
Kumar Gala01cced22006-04-11 10:07:16 -05001336#endif
1337
1338#ifdef PCI_DRIVER
1339 retval = pci_register_driver(&PCI_DRIVER);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001340 if (retval < 0)
1341 goto clean1;
Geoff Levandad75a412007-01-15 20:11:47 -08001342#endif
1343
1344#ifdef PS3_SYSTEM_BUS_DRIVER
Geoff Levand7a4eb7f2007-06-05 20:04:35 -07001345 retval = ps3_ehci_driver_register(&PS3_SYSTEM_BUS_DRIVER);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001346 if (retval < 0)
1347 goto clean2;
Kumar Gala01cced22006-04-11 10:07:16 -05001348#endif
1349
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001350#ifdef OF_PLATFORM_DRIVER
Grant Likelyd35fb642011-02-22 21:08:34 -07001351 retval = platform_driver_register(&OF_PLATFORM_DRIVER);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001352 if (retval < 0)
1353 goto clean3;
1354#endif
Grant Likely1f23b2d2010-06-02 13:53:17 -06001355
1356#ifdef XILINX_OF_PLATFORM_DRIVER
Grant Likelyd35fb642011-02-22 21:08:34 -07001357 retval = platform_driver_register(&XILINX_OF_PLATFORM_DRIVER);
Grant Likely1f23b2d2010-06-02 13:53:17 -06001358 if (retval < 0)
1359 goto clean4;
1360#endif
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001361 return retval;
1362
Grant Likely1f23b2d2010-06-02 13:53:17 -06001363#ifdef XILINX_OF_PLATFORM_DRIVER
Grant Likelyd35fb642011-02-22 21:08:34 -07001364 /* platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER); */
Grant Likely1f23b2d2010-06-02 13:53:17 -06001365clean4:
1366#endif
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001367#ifdef OF_PLATFORM_DRIVER
Grant Likelyd35fb642011-02-22 21:08:34 -07001368 platform_driver_unregister(&OF_PLATFORM_DRIVER);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001369clean3:
1370#endif
1371#ifdef PS3_SYSTEM_BUS_DRIVER
1372 ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1373clean2:
1374#endif
1375#ifdef PCI_DRIVER
1376 pci_unregister_driver(&PCI_DRIVER);
1377clean1:
1378#endif
1379#ifdef PLATFORM_DRIVER
1380 platform_driver_unregister(&PLATFORM_DRIVER);
1381clean0:
1382#endif
1383#ifdef DEBUG
1384 debugfs_remove(ehci_debug_root);
1385 ehci_debug_root = NULL;
Alan Stern9beeee62008-10-02 11:48:13 -04001386err_debug:
Linus Torvaldsa9b61482008-10-20 14:23:29 -07001387#endif
Alan Stern9beeee62008-10-02 11:48:13 -04001388 clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
Kumar Gala01cced22006-04-11 10:07:16 -05001389 return retval;
1390}
1391module_init(ehci_hcd_init);
1392
1393static void __exit ehci_hcd_cleanup(void)
1394{
Grant Likely1f23b2d2010-06-02 13:53:17 -06001395#ifdef XILINX_OF_PLATFORM_DRIVER
Grant Likelyd35fb642011-02-22 21:08:34 -07001396 platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER);
Grant Likely1f23b2d2010-06-02 13:53:17 -06001397#endif
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001398#ifdef OF_PLATFORM_DRIVER
Grant Likelyd35fb642011-02-22 21:08:34 -07001399 platform_driver_unregister(&OF_PLATFORM_DRIVER);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001400#endif
Kumar Gala01cced22006-04-11 10:07:16 -05001401#ifdef PLATFORM_DRIVER
1402 platform_driver_unregister(&PLATFORM_DRIVER);
1403#endif
1404#ifdef PCI_DRIVER
1405 pci_unregister_driver(&PCI_DRIVER);
1406#endif
Geoff Levandad75a412007-01-15 20:11:47 -08001407#ifdef PS3_SYSTEM_BUS_DRIVER
Geoff Levand7a4eb7f2007-06-05 20:04:35 -07001408 ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
Geoff Levandad75a412007-01-15 20:11:47 -08001409#endif
Tony Jones694cc202007-09-11 14:07:31 -07001410#ifdef DEBUG
1411 debugfs_remove(ehci_debug_root);
1412#endif
Alan Stern9beeee62008-10-02 11:48:13 -04001413 clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
Kumar Gala01cced22006-04-11 10:07:16 -05001414}
1415module_exit(ehci_hcd_cleanup);
1416