blob: c5719cd258c3a12652e72381474b595825418e46 [file] [log] [blame]
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>
Ming Lei3c04e202008-09-18 23:06:21 +080026#include <linux/vmalloc.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/errno.h>
28#include <linux/init.h>
29#include <linux/timer.h>
Oliver Neukumee4ecb82009-11-27 15:17:59 +010030#include <linux/ktime.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include <linux/list.h>
32#include <linux/interrupt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include <linux/usb.h>
Eric Lescouet27729aa2010-04-24 23:21:52 +020034#include <linux/usb/hcd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include <linux/moduleparam.h>
36#include <linux/dma-mapping.h>
Tony Jones694cc202007-09-11 14:07:31 -070037#include <linux/debugfs.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090038#include <linux/slab.h>
Alek Duaa4d8342010-06-04 15:47:54 +080039#include <linux/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#include <asm/byteorder.h>
42#include <asm/io.h>
43#include <asm/irq.h>
44#include <asm/system.h>
45#include <asm/unaligned.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046
47/*-------------------------------------------------------------------------*/
48
49/*
50 * EHCI hc_driver implementation ... experimental, incomplete.
51 * Based on the final 1.0 register interface specification.
52 *
53 * USB 2.0 shows up in upcoming www.pcmcia.org technology.
54 * First was PCMCIA, like ISA; then CardBus, which is PCI.
55 * Next comes "CardBay", using USB 2.0 signals.
56 *
57 * Contains additional contributions by Brad Hards, Rory Bolt, and others.
58 * Special thanks to Intel and VIA for providing host controllers to
59 * test this driver on, and Cypress (including In-System Design) for
60 * providing early devices for those host controllers to talk to!
Linus Torvalds1da177e2005-04-16 15:20:36 -070061 */
62
Linus Torvalds1da177e2005-04-16 15:20:36 -070063#define DRIVER_AUTHOR "David Brownell"
64#define DRIVER_DESC "USB 2.0 'Enhanced' Host Controller (EHCI) Driver"
65
66static const char hcd_name [] = "ehci_hcd";
67
68
David Brownell9776afc2008-02-01 11:42:05 -080069#undef VERBOSE_DEBUG
Linus Torvalds1da177e2005-04-16 15:20:36 -070070#undef EHCI_URB_TRACE
71
72#ifdef DEBUG
73#define EHCI_STATS
74#endif
75
76/* magic numbers that can affect system performance */
77#define EHCI_TUNE_CERR 3 /* 0-3 qtd retries; 0 == don't stop */
78#define EHCI_TUNE_RL_HS 4 /* nak throttle; see 4.9 */
79#define EHCI_TUNE_RL_TT 0
80#define EHCI_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */
81#define EHCI_TUNE_MULT_TT 1
Alan Sternffda0802010-07-14 11:03:46 -040082/*
83 * Some drivers think it's safe to schedule isochronous transfers more than
84 * 256 ms into the future (partly as a result of an old bug in the scheduling
85 * code). In an attempt to avoid trouble, we will use a minimum scheduling
86 * length of 512 frames instead of 256.
87 */
88#define EHCI_TUNE_FLS 1 /* (medium) 512-frame schedule */
Linus Torvalds1da177e2005-04-16 15:20:36 -070089
Alan Stern07d29b62007-12-11 16:05:30 -050090#define EHCI_IAA_MSECS 10 /* arbitrary */
Linus Torvalds1da177e2005-04-16 15:20:36 -070091#define EHCI_IO_JIFFIES (HZ/10) /* io watchdog > irq_thresh */
92#define EHCI_ASYNC_JIFFIES (HZ/20) /* async idle timeout */
David Brownellb9638012008-06-03 22:21:55 -070093#define EHCI_SHRINK_FRAMES 5 /* async qh unlink delay */
Linus Torvalds1da177e2005-04-16 15:20:36 -070094
95/* Initial IRQ latency: faster than hw default */
96static int log2_irq_thresh = 0; // 0 to 6
97module_param (log2_irq_thresh, int, S_IRUGO);
98MODULE_PARM_DESC (log2_irq_thresh, "log2 IRQ latency, 1-64 microframes");
99
100/* initial park setting: slower than hw default */
101static unsigned park = 0;
102module_param (park, uint, S_IRUGO);
103MODULE_PARM_DESC (park, "park setting; 1-3 back-to-back async packets");
104
David Brownell93f1a472006-11-16 23:34:58 -0800105/* for flakey hardware, ignore overcurrent indicators */
106static int ignore_oc = 0;
107module_param (ignore_oc, bool, S_IRUGO);
108MODULE_PARM_DESC (ignore_oc, "ignore bogus hardware overcurrent indications");
109
Alek Du48f24972010-06-04 15:47:55 +0800110/* for link power management(LPM) feature */
111static unsigned int hird;
112module_param(hird, int, S_IRUGO);
113MODULE_PARM_DESC(hird, "host initiated resume duration, +1 for each 75us\n");
114
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115#define INTR_MASK (STS_IAA | STS_FATAL | STS_PCD | STS_ERR | STS_INT)
116
117/*-------------------------------------------------------------------------*/
118
119#include "ehci.h"
120#include "ehci-dbg.c"
Andiry Xuad935622011-03-01 14:57:05 +0800121#include "pci-quirks.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122
123/*-------------------------------------------------------------------------*/
124
Alan Sternbc298472009-02-11 14:26:38 -0500125static void
126timer_action(struct ehci_hcd *ehci, enum ehci_timer_action action)
127{
128 /* Don't override timeouts which shrink or (later) disable
129 * the async ring; just the I/O watchdog. Note that if a
130 * SHRINK were pending, OFF would never be requested.
131 */
132 if (timer_pending(&ehci->watchdog)
133 && ((BIT(TIMER_ASYNC_SHRINK) | BIT(TIMER_ASYNC_OFF))
134 & ehci->actions))
135 return;
136
137 if (!test_and_set_bit(action, &ehci->actions)) {
138 unsigned long t;
139
140 switch (action) {
141 case TIMER_IO_WATCHDOG:
Alek Du403dbd32009-07-13 17:30:41 +0800142 if (!ehci->need_io_watchdog)
143 return;
Alan Sternbc298472009-02-11 14:26:38 -0500144 t = EHCI_IO_JIFFIES;
145 break;
146 case TIMER_ASYNC_OFF:
147 t = EHCI_ASYNC_JIFFIES;
148 break;
149 /* case TIMER_ASYNC_SHRINK: */
150 default:
151 /* add a jiffie since we synch against the
152 * 8 KHz uframe counter.
153 */
154 t = DIV_ROUND_UP(EHCI_SHRINK_FRAMES * HZ, 1000) + 1;
155 break;
156 }
157 mod_timer(&ehci->watchdog, t + jiffies);
158 }
159}
160
161/*-------------------------------------------------------------------------*/
162
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163/*
164 * handshake - spin reading hc until handshake completes or fails
165 * @ptr: address of hc register to be read
166 * @mask: bits to look at in result of read
167 * @done: value of those bits when handshake succeeds
168 * @usec: timeout in microseconds
169 *
170 * Returns negative errno, or zero on success
171 *
172 * Success happens when the "mask" bits have the specified value (hardware
173 * handshake done). There are two failure modes: "usec" have passed (major
174 * hardware flakeout), or the register reads as all-ones (hardware removed).
175 *
176 * That last failure should_only happen in cases like physical cardbus eject
177 * before driver shutdown. But it also seems to be caused by bugs in cardbus
178 * bridge shutdown: shutting down the bridge before the devices using it.
179 */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100180static int handshake (struct ehci_hcd *ehci, void __iomem *ptr,
181 u32 mask, u32 done, int usec)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182{
183 u32 result;
184
185 do {
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100186 result = ehci_readl(ehci, ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 if (result == ~(u32)0) /* card removed */
188 return -ENODEV;
189 result &= mask;
190 if (result == done)
191 return 0;
192 udelay (1);
193 usec--;
194 } while (usec > 0);
195 return -ETIMEDOUT;
196}
197
Matthieu CASTET65fd4272010-09-06 18:26:56 +0200198/* check TDI/ARC silicon is in host mode */
199static int tdi_in_host_mode (struct ehci_hcd *ehci)
200{
201 u32 __iomem *reg_ptr;
202 u32 tmp;
203
204 reg_ptr = (u32 __iomem *)(((u8 __iomem *)ehci->regs) + USBMODE);
205 tmp = ehci_readl(ehci, reg_ptr);
206 return (tmp & 3) == USBMODE_CM_HC;
207}
208
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209/* force HC to halt state from unknown (EHCI spec section 2.3) */
210static int ehci_halt (struct ehci_hcd *ehci)
211{
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100212 u32 temp = ehci_readl(ehci, &ehci->regs->status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213
David Brownell72f30b62005-09-27 10:19:39 -0700214 /* disable any irqs left enabled by previous code */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100215 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
David Brownell72f30b62005-09-27 10:19:39 -0700216
Matthieu CASTET65fd4272010-09-06 18:26:56 +0200217 if (ehci_is_TDI(ehci) && tdi_in_host_mode(ehci) == 0) {
218 return 0;
219 }
220
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 if ((temp & STS_HALT) != 0)
222 return 0;
223
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100224 temp = ehci_readl(ehci, &ehci->regs->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 temp &= ~CMD_RUN;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100226 ehci_writel(ehci, temp, &ehci->regs->command);
227 return handshake (ehci, &ehci->regs->status,
228 STS_HALT, STS_HALT, 16 * 125);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229}
230
David Brownell0bcfeb32008-08-26 14:43:46 -0700231static int handshake_on_error_set_halt(struct ehci_hcd *ehci, void __iomem *ptr,
232 u32 mask, u32 done, int usec)
233{
234 int error;
235
236 error = handshake(ehci, ptr, mask, done, usec);
237 if (error) {
238 ehci_halt(ehci);
239 ehci_to_hcd(ehci)->state = HC_STATE_HALT;
Ozan Çağlayan65cb76b2009-10-13 08:37:09 +0300240 ehci_err(ehci, "force halt; handshake %p %08x %08x -> %d\n",
David Brownell0bcfeb32008-08-26 14:43:46 -0700241 ptr, mask, done, error);
242 }
243
244 return error;
245}
246
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247/* put TDI/ARC silicon into EHCI mode */
248static void tdi_reset (struct ehci_hcd *ehci)
249{
250 u32 __iomem *reg_ptr;
251 u32 tmp;
252
Vladimir Barinovd23a1372007-05-23 20:07:48 +0400253 reg_ptr = (u32 __iomem *)(((u8 __iomem *)ehci->regs) + USBMODE);
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100254 tmp = ehci_readl(ehci, reg_ptr);
Vladimir Barinovd23a1372007-05-23 20:07:48 +0400255 tmp |= USBMODE_CM_HC;
256 /* The default byte access to MMR space is LE after
257 * controller reset. Set the required endian mode
258 * for transfer buffers to match the host microprocessor
259 */
260 if (ehci_big_endian_mmio(ehci))
261 tmp |= USBMODE_BE;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100262 ehci_writel(ehci, tmp, reg_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263}
264
265/* reset a non-running (STS_HALT == 1) controller */
266static int ehci_reset (struct ehci_hcd *ehci)
267{
268 int retval;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100269 u32 command = ehci_readl(ehci, &ehci->regs->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270
Jason Wessel8d053c72009-08-20 15:39:54 -0500271 /* If the EHCI debug controller is active, special care must be
272 * taken before and after a host controller reset */
273 if (ehci->debug && !dbgp_reset_prep())
274 ehci->debug = NULL;
275
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 command |= CMD_RESET;
277 dbg_cmd (ehci, "reset", command);
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100278 ehci_writel(ehci, command, &ehci->regs->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 ehci_to_hcd(ehci)->state = HC_STATE_HALT;
280 ehci->next_statechange = jiffies;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100281 retval = handshake (ehci, &ehci->regs->command,
282 CMD_RESET, 0, 250 * 1000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283
Alek Du331ac6b2009-07-13 12:41:20 +0800284 if (ehci->has_hostpc) {
285 ehci_writel(ehci, USBMODE_EX_HC | USBMODE_EX_VBPS,
286 (u32 __iomem *)(((u8 *)ehci->regs) + USBMODE_EX));
287 ehci_writel(ehci, TXFIFO_DEFAULT,
288 (u32 __iomem *)(((u8 *)ehci->regs) + TXFILLTUNING));
289 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 if (retval)
291 return retval;
292
293 if (ehci_is_TDI(ehci))
294 tdi_reset (ehci);
295
Jason Wessel8d053c72009-08-20 15:39:54 -0500296 if (ehci->debug)
297 dbgp_external_startup();
298
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 return retval;
300}
301
302/* idle the controller (from running) */
303static void ehci_quiesce (struct ehci_hcd *ehci)
304{
305 u32 temp;
306
307#ifdef DEBUG
308 if (!HC_IS_RUNNING (ehci_to_hcd(ehci)->state))
309 BUG ();
310#endif
311
312 /* wait for any schedule enables/disables to take effect */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100313 temp = ehci_readl(ehci, &ehci->regs->command) << 10;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 temp &= STS_ASS | STS_PSS;
Karsten Wiesec765d4c2008-02-16 13:44:42 -0800315 if (handshake_on_error_set_halt(ehci, &ehci->regs->status,
316 STS_ASS | STS_PSS, temp, 16 * 125))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318
319 /* then disable anything that's still active */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100320 temp = ehci_readl(ehci, &ehci->regs->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 temp &= ~(CMD_ASE | CMD_IAAD | CMD_PSE);
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100322 ehci_writel(ehci, temp, &ehci->regs->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323
324 /* hardware can take 16 microframes to turn off ... */
Karsten Wiesec765d4c2008-02-16 13:44:42 -0800325 handshake_on_error_set_halt(ehci, &ehci->regs->status,
326 STS_ASS | STS_PSS, 0, 16 * 125);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327}
328
329/*-------------------------------------------------------------------------*/
330
Alan Stern07d29b62007-12-11 16:05:30 -0500331static void end_unlink_async(struct ehci_hcd *ehci);
David Howells7d12e782006-10-05 14:55:46 +0100332static void ehci_work(struct ehci_hcd *ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333
334#include "ehci-hub.c"
Alek Du48f24972010-06-04 15:47:55 +0800335#include "ehci-lpm.c"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336#include "ehci-mem.c"
337#include "ehci-q.c"
338#include "ehci-sched.c"
339
340/*-------------------------------------------------------------------------*/
341
Alan Stern07d29b62007-12-11 16:05:30 -0500342static void ehci_iaa_watchdog(unsigned long param)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343{
344 struct ehci_hcd *ehci = (struct ehci_hcd *) param;
345 unsigned long flags;
346
347 spin_lock_irqsave (&ehci->lock, flags);
348
David Brownelle82cc122008-03-07 13:49:42 -0800349 /* Lost IAA irqs wedge things badly; seen first with a vt8235.
350 * So we need this watchdog, but must protect it against both
351 * (a) SMP races against real IAA firing and retriggering, and
352 * (b) clean HC shutdown, when IAA watchdog was pending.
353 */
354 if (ehci->reclaim
355 && !timer_pending(&ehci->iaa_watchdog)
356 && HC_IS_RUNNING(ehci_to_hcd(ehci)->state)) {
357 u32 cmd, status;
Alan Stern07d29b62007-12-11 16:05:30 -0500358
David Brownelle82cc122008-03-07 13:49:42 -0800359 /* If we get here, IAA is *REALLY* late. It's barely
360 * conceivable that the system is so busy that CMD_IAAD
361 * is still legitimately set, so let's be sure it's
362 * clear before we read STS_IAA. (The HC should clear
363 * CMD_IAAD when it sets STS_IAA.)
364 */
365 cmd = ehci_readl(ehci, &ehci->regs->command);
366 if (cmd & CMD_IAAD)
367 ehci_writel(ehci, cmd & ~CMD_IAAD,
368 &ehci->regs->command);
369
370 /* If IAA is set here it either legitimately triggered
371 * before we cleared IAAD above (but _way_ late, so we'll
372 * still count it as lost) ... or a silicon erratum:
373 * - VIA seems to set IAA without triggering the IRQ;
374 * - IAAD potentially cleared without setting IAA.
375 */
376 status = ehci_readl(ehci, &ehci->regs->status);
377 if ((status & STS_IAA) || !(cmd & CMD_IAAD)) {
Greg Kroah-Hartman64f89792006-10-17 13:57:18 -0700378 COUNT (ehci->stats.lost_iaa);
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100379 ehci_writel(ehci, STS_IAA, &ehci->regs->status);
Greg Kroah-Hartman64f89792006-10-17 13:57:18 -0700380 }
David Brownelle82cc122008-03-07 13:49:42 -0800381
382 ehci_vdbg(ehci, "IAA watchdog: status %x cmd %x\n",
383 status, cmd);
Alan Stern07d29b62007-12-11 16:05:30 -0500384 end_unlink_async(ehci);
Greg Kroah-Hartman64f89792006-10-17 13:57:18 -0700385 }
386
Alan Stern07d29b62007-12-11 16:05:30 -0500387 spin_unlock_irqrestore(&ehci->lock, flags);
388}
389
390static void ehci_watchdog(unsigned long param)
391{
392 struct ehci_hcd *ehci = (struct ehci_hcd *) param;
393 unsigned long flags;
394
395 spin_lock_irqsave(&ehci->lock, flags);
396
397 /* stop async processing after it's idled a bit */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 if (test_bit (TIMER_ASYNC_OFF, &ehci->actions))
David Brownell26f953f2006-09-18 17:03:16 -0700399 start_unlink_async (ehci, ehci->async);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400
401 /* ehci could run by timer, without IRQs ... */
David Howells7d12e782006-10-05 14:55:46 +0100402 ehci_work (ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403
404 spin_unlock_irqrestore (&ehci->lock, flags);
405}
406
Alan Stern89037952007-02-13 14:55:27 -0500407/* On some systems, leaving remote wakeup enabled prevents system shutdown.
408 * The firmware seems to think that powering off is a wakeup event!
409 * This routine turns off remote wakeup and everything else, on all ports.
410 */
411static void ehci_turn_off_all_ports(struct ehci_hcd *ehci)
412{
413 int port = HCS_N_PORTS(ehci->hcs_params);
414
415 while (port--)
416 ehci_writel(ehci, PORT_RWC_BITS,
417 &ehci->regs->port_status[port]);
418}
419
Sarah Sharp21da84a2008-04-08 14:30:18 -0700420/*
421 * Halt HC, turn off all ports, and let the BIOS use the companion controllers.
422 * Should be called with ehci->lock held.
David Brownell72f30b62005-09-27 10:19:39 -0700423 */
Sarah Sharp21da84a2008-04-08 14:30:18 -0700424static void ehci_silence_controller(struct ehci_hcd *ehci)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425{
Sarah Sharp21da84a2008-04-08 14:30:18 -0700426 ehci_halt(ehci);
Alan Stern89037952007-02-13 14:55:27 -0500427 ehci_turn_off_all_ports(ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428
429 /* make BIOS/etc use companion controller during reboot */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100430 ehci_writel(ehci, 0, &ehci->regs->configured_flag);
Alan Stern89037952007-02-13 14:55:27 -0500431
432 /* unblock posted writes */
433 ehci_readl(ehci, &ehci->regs->configured_flag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434}
435
Sarah Sharp21da84a2008-04-08 14:30:18 -0700436/* ehci_shutdown kick in for silicon on any bus (not just pci, etc).
437 * This forcibly disables dma and IRQs, helping kexec and other cases
438 * where the next system software may expect clean state.
439 */
440static void ehci_shutdown(struct usb_hcd *hcd)
441{
442 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
443
444 del_timer_sync(&ehci->watchdog);
445 del_timer_sync(&ehci->iaa_watchdog);
446
447 spin_lock_irq(&ehci->lock);
448 ehci_silence_controller(ehci);
449 spin_unlock_irq(&ehci->lock);
450}
451
David Brownell56c1e262005-04-09 09:00:29 -0700452static void ehci_port_power (struct ehci_hcd *ehci, int is_on)
453{
454 unsigned port;
455
456 if (!HCS_PPC (ehci->hcs_params))
457 return;
458
459 ehci_dbg (ehci, "...power%s ports...\n", is_on ? "up" : "down");
460 for (port = HCS_N_PORTS (ehci->hcs_params); port > 0; )
461 (void) ehci_hub_control(ehci_to_hcd(ehci),
462 is_on ? SetPortFeature : ClearPortFeature,
463 USB_PORT_FEAT_POWER,
464 port--, NULL, 0);
Alan Stern383975d2007-05-04 11:52:40 -0400465 /* Flush those writes */
466 ehci_readl(ehci, &ehci->regs->command);
David Brownell56c1e262005-04-09 09:00:29 -0700467 msleep(20);
468}
469
Matt Porter7ff71d62005-09-22 22:31:15 -0700470/*-------------------------------------------------------------------------*/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471
Matt Porter7ff71d62005-09-22 22:31:15 -0700472/*
473 * ehci_work is called from some interrupts, timers, and so on.
474 * it calls driver completion functions, after dropping ehci->lock.
475 */
David Howells7d12e782006-10-05 14:55:46 +0100476static void ehci_work (struct ehci_hcd *ehci)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477{
Matt Porter7ff71d62005-09-22 22:31:15 -0700478 timer_action_done (ehci, TIMER_IO_WATCHDOG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479
Matt Porter7ff71d62005-09-22 22:31:15 -0700480 /* another CPU may drop ehci->lock during a schedule scan while
481 * it reports urb completions. this flag guards against bogus
482 * attempts at re-entrant schedule scanning.
483 */
484 if (ehci->scanning)
485 return;
486 ehci->scanning = 1;
David Howells7d12e782006-10-05 14:55:46 +0100487 scan_async (ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700488 if (ehci->next_uframe != -1)
David Howells7d12e782006-10-05 14:55:46 +0100489 scan_periodic (ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700490 ehci->scanning = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491
Matt Porter7ff71d62005-09-22 22:31:15 -0700492 /* the IO watchdog guards against hardware or driver bugs that
493 * misplace IRQs, and should let us run completely without IRQs.
494 * such lossage has been observed on both VT6202 and VT8235.
495 */
496 if (HC_IS_RUNNING (ehci_to_hcd(ehci)->state) &&
497 (ehci->async->qh_next.ptr != NULL ||
498 ehci->periodic_sched != 0))
499 timer_action (ehci, TIMER_IO_WATCHDOG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500}
501
Sarah Sharp21da84a2008-04-08 14:30:18 -0700502/*
503 * Called when the ehci_hcd module is removed.
504 */
Matt Porter7ff71d62005-09-22 22:31:15 -0700505static void ehci_stop (struct usb_hcd *hcd)
506{
507 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
508
509 ehci_dbg (ehci, "stop\n");
510
Matt Porter7ff71d62005-09-22 22:31:15 -0700511 /* no more interrupts ... */
512 del_timer_sync (&ehci->watchdog);
Alan Stern07d29b62007-12-11 16:05:30 -0500513 del_timer_sync(&ehci->iaa_watchdog);
Matt Porter7ff71d62005-09-22 22:31:15 -0700514
515 spin_lock_irq(&ehci->lock);
516 if (HC_IS_RUNNING (hcd->state))
517 ehci_quiesce (ehci);
518
Sarah Sharp21da84a2008-04-08 14:30:18 -0700519 ehci_silence_controller(ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700520 ehci_reset (ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700521 spin_unlock_irq(&ehci->lock);
522
Alan Stern57e06c12007-01-16 11:59:45 -0500523 remove_companion_file(ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700524 remove_debug_files (ehci);
525
526 /* root hub is shut down separately (first, when possible) */
527 spin_lock_irq (&ehci->lock);
528 if (ehci->async)
David Howells7d12e782006-10-05 14:55:46 +0100529 ehci_work (ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700530 spin_unlock_irq (&ehci->lock);
531 ehci_mem_cleanup (ehci);
532
Andiry Xuad935622011-03-01 14:57:05 +0800533 if (ehci->amd_pll_fix == 1)
534 usb_amd_dev_put();
Alex He05570292010-12-07 10:10:08 +0800535
Matt Porter7ff71d62005-09-22 22:31:15 -0700536#ifdef EHCI_STATS
537 ehci_dbg (ehci, "irq normal %ld err %ld reclaim %ld (lost %ld)\n",
538 ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim,
539 ehci->stats.lost_iaa);
540 ehci_dbg (ehci, "complete %ld unlink %ld\n",
541 ehci->stats.complete, ehci->stats.unlink);
542#endif
543
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100544 dbg_status (ehci, "ehci_stop completed",
545 ehci_readl(ehci, &ehci->regs->status));
Matt Porter7ff71d62005-09-22 22:31:15 -0700546}
547
David Brownell18807522005-11-23 15:45:37 -0800548/* one-time init, only for memory state */
549static int ehci_init(struct usb_hcd *hcd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550{
David Brownell18807522005-11-23 15:45:37 -0800551 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 u32 temp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 int retval;
554 u32 hcc_params;
Alek Du3807e262009-07-14 07:23:29 +0800555 struct ehci_qh_hw *hw;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556
David Brownell18807522005-11-23 15:45:37 -0800557 spin_lock_init(&ehci->lock);
558
Alek Du403dbd32009-07-13 17:30:41 +0800559 /*
560 * keep io watchdog by default, those good HCDs could turn off it later
561 */
562 ehci->need_io_watchdog = 1;
David Brownell18807522005-11-23 15:45:37 -0800563 init_timer(&ehci->watchdog);
564 ehci->watchdog.function = ehci_watchdog;
565 ehci->watchdog.data = (unsigned long) ehci;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566
Alan Stern07d29b62007-12-11 16:05:30 -0500567 init_timer(&ehci->iaa_watchdog);
568 ehci->iaa_watchdog.function = ehci_iaa_watchdog;
569 ehci->iaa_watchdog.data = (unsigned long) ehci;
570
Alan Sternf75593c2011-01-06 10:17:09 -0500571 hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params);
572
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 /*
574 * hw default: 1K periodic list heads, one per frame.
575 * periodic_size can shrink by USBCMD update if hcc_params allows.
576 */
577 ehci->periodic_size = DEFAULT_I_TDPS;
Karsten Wiese9aa09d22009-02-08 16:07:58 -0800578 INIT_LIST_HEAD(&ehci->cached_itd_list);
Alan Stern0e5f2312010-04-08 16:56:37 -0400579 INIT_LIST_HEAD(&ehci->cached_sitd_list);
Alan Sternf75593c2011-01-06 10:17:09 -0500580
581 if (HCC_PGM_FRAMELISTLEN(hcc_params)) {
582 /* periodic schedule size can be smaller than default */
583 switch (EHCI_TUNE_FLS) {
584 case 0: ehci->periodic_size = 1024; break;
585 case 1: ehci->periodic_size = 512; break;
586 case 2: ehci->periodic_size = 256; break;
587 default: BUG();
588 }
589 }
David Brownell18807522005-11-23 15:45:37 -0800590 if ((retval = ehci_mem_init(ehci, GFP_KERNEL)) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 return retval;
592
593 /* controllers may cache some of the periodic schedule ... */
David Brownell53bd6a62006-08-30 14:50:06 -0700594 if (HCC_ISOC_CACHE(hcc_params)) // full frame cache
Sarah Sharpdccd5742009-10-27 10:55:05 -0700595 ehci->i_thresh = 2 + 8;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 else // N microframes cached
David Brownell18807522005-11-23 15:45:37 -0800597 ehci->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598
599 ehci->reclaim = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 ehci->next_uframe = -1;
Karsten Wiese9aa09d22009-02-08 16:07:58 -0800601 ehci->clock_frame = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 /*
604 * dedicate a qh for the async ring head, since we couldn't unlink
605 * a 'real' qh without stopping the async schedule [4.8]. use it
606 * as the 'reclamation list head' too.
607 * its dummy is used in hw_alt_next of many tds, to prevent the qh
608 * from automatically advancing to the next td after short reads.
609 */
David Brownell18807522005-11-23 15:45:37 -0800610 ehci->async->qh_next.qh = NULL;
Alek Du3807e262009-07-14 07:23:29 +0800611 hw = ehci->async->hw;
612 hw->hw_next = QH_NEXT(ehci, ehci->async->qh_dma);
613 hw->hw_info1 = cpu_to_hc32(ehci, QH_HEAD);
614 hw->hw_token = cpu_to_hc32(ehci, QTD_STS_HALT);
615 hw->hw_qtd_next = EHCI_LIST_END(ehci);
David Brownell18807522005-11-23 15:45:37 -0800616 ehci->async->qh_state = QH_STATE_LINKED;
Alek Du3807e262009-07-14 07:23:29 +0800617 hw->hw_alt_next = QTD_NEXT(ehci, ehci->async->dummy->qtd_dma);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618
619 /* clear interrupt enables, set irq latency */
620 if (log2_irq_thresh < 0 || log2_irq_thresh > 6)
621 log2_irq_thresh = 0;
622 temp = 1 << (16 + log2_irq_thresh);
Alek Du5a9cdf32010-06-04 15:47:56 +0800623 if (HCC_PER_PORT_CHANGE_EVENT(hcc_params)) {
624 ehci->has_ppcd = 1;
625 ehci_dbg(ehci, "enable per-port change event\n");
626 temp |= CMD_PPCEE;
627 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 if (HCC_CANPARK(hcc_params)) {
629 /* HW default park == 3, on hardware that supports it (like
630 * NVidia and ALI silicon), maximizes throughput on the async
631 * schedule by avoiding QH fetches between transfers.
632 *
633 * With fast usb storage devices and NForce2, "park" seems to
634 * make problems: throughput reduction (!), data errors...
635 */
636 if (park) {
David Brownell18807522005-11-23 15:45:37 -0800637 park = min(park, (unsigned) 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 temp |= CMD_PARK;
639 temp |= park << 8;
640 }
David Brownell18807522005-11-23 15:45:37 -0800641 ehci_dbg(ehci, "park %d\n", park);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 }
David Brownell18807522005-11-23 15:45:37 -0800643 if (HCC_PGM_FRAMELISTLEN(hcc_params)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 /* periodic schedule size can be smaller than default */
645 temp &= ~(3 << 2);
646 temp |= (EHCI_TUNE_FLS << 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 }
Alek Du48f24972010-06-04 15:47:55 +0800648 if (HCC_LPM(hcc_params)) {
649 /* support link power management EHCI 1.1 addendum */
650 ehci_dbg(ehci, "support lpm\n");
651 ehci->has_lpm = 1;
652 if (hird > 0xf) {
653 ehci_dbg(ehci, "hird %d invalid, use default 0",
654 hird);
655 hird = 0;
656 }
657 temp |= hird << 24;
658 }
David Brownell18807522005-11-23 15:45:37 -0800659 ehci->command = temp;
660
Alan Stern40f8db82009-11-06 12:29:40 -0500661 /* Accept arbitrarily long scatter-gather lists */
Andrea Righi4307a282010-06-28 16:56:45 +0200662 if (!(hcd->driver->flags & HCD_LOCAL_MEM))
663 hcd->self.sg_tablesize = ~0;
David Brownell18807522005-11-23 15:45:37 -0800664 return 0;
665}
666
667/* start HC running; it's halted, ehci_init() has been run (once) */
668static int ehci_run (struct usb_hcd *hcd)
669{
670 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
671 int retval;
672 u32 temp;
673 u32 hcc_params;
674
Marcelo Tosatti1d619f12007-01-21 19:45:59 -0200675 hcd->uses_new_polling = 1;
Marcelo Tosatti1d619f12007-01-21 19:45:59 -0200676
David Brownell18807522005-11-23 15:45:37 -0800677 /* EHCI spec section 4.1 */
Matthieu CASTETbcf40812011-02-15 18:40:28 +0100678 /*
679 * TDI driver does the ehci_reset in their reset callback.
680 * Don't reset here, because configuration settings will
681 * vanish.
682 */
683 if (!ehci_is_TDI(ehci) && (retval = ehci_reset(ehci)) != 0) {
David Brownell18807522005-11-23 15:45:37 -0800684 ehci_mem_cleanup(ehci);
685 return retval;
686 }
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100687 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
688 ehci_writel(ehci, (u32)ehci->async->qh_dma, &ehci->regs->async_next);
David Brownell18807522005-11-23 15:45:37 -0800689
690 /*
691 * hcc_params controls whether ehci->regs->segment must (!!!)
692 * be used; it constrains QH/ITD/SITD and QTD locations.
693 * pci_pool consistent memory always uses segment zero.
694 * streaming mappings for I/O buffers, like pci_map_single(),
695 * can return segments above 4GB, if the device allows.
696 *
697 * NOTE: the dma mask is visible through dma_supported(), so
698 * drivers can pass this info along ... like NETIF_F_HIGHDMA,
699 * Scsi_Host.highmem_io, and so forth. It's readonly to all
700 * host side drivers though.
701 */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100702 hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params);
David Brownell18807522005-11-23 15:45:37 -0800703 if (HCC_64BIT_ADDR(hcc_params)) {
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100704 ehci_writel(ehci, 0, &ehci->regs->segment);
David Brownell18807522005-11-23 15:45:37 -0800705#if 0
706// this is deeply broken on almost all architectures
Yang Hongyang6a355282009-04-06 19:01:13 -0700707 if (!dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64)))
David Brownell18807522005-11-23 15:45:37 -0800708 ehci_info(ehci, "enabled 64bit DMA\n");
709#endif
710 }
711
712
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 // Philips, Intel, and maybe others need CMD_RUN before the
714 // root hub will detect new devices (why?); NEC doesn't
David Brownell18807522005-11-23 15:45:37 -0800715 ehci->command &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET);
716 ehci->command |= CMD_RUN;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100717 ehci_writel(ehci, ehci->command, &ehci->regs->command);
David Brownell18807522005-11-23 15:45:37 -0800718 dbg_cmd (ehci, "init", ehci->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720 /*
721 * Start, enabling full USB 2.0 functionality ... usb 1.1 devices
722 * are explicitly handed to companion controller(s), so no TT is
723 * involved with the root hub. (Except where one is integrated,
724 * and there's no companion controller unless maybe for USB OTG.)
Alan Stern32fe0192007-10-10 16:27:07 -0400725 *
726 * Turning on the CF flag will transfer ownership of all ports
727 * from the companions to the EHCI controller. If any of the
728 * companions are in the middle of a port reset at the time, it
729 * could cause trouble. Write-locking ehci_cf_port_reset_rwsem
David Brownell1cb52652007-11-13 16:22:30 -0800730 * guarantees that no resets are in progress. After we set CF,
731 * a short delay lets the hardware catch up; new resets shouldn't
732 * be started before the port switching actions could complete.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733 */
Alan Stern32fe0192007-10-10 16:27:07 -0400734 down_write(&ehci_cf_port_reset_rwsem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 hcd->state = HC_STATE_RUNNING;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100736 ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
737 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
David Brownell1cb52652007-11-13 16:22:30 -0800738 msleep(5);
Alan Stern32fe0192007-10-10 16:27:07 -0400739 up_write(&ehci_cf_port_reset_rwsem);
Oliver Neukumee4ecb82009-11-27 15:17:59 +0100740 ehci->last_periodic_enable = ktime_get_real();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741
Jan Anderssonc4301312011-05-03 20:11:57 +0200742 temp = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743 ehci_info (ehci,
Alan Stern2b70f072008-10-02 11:47:15 -0400744 "USB %x.%x started, EHCI %x.%02x%s\n",
Matt Porter7ff71d62005-09-22 22:31:15 -0700745 ((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f),
Alan Stern2b70f072008-10-02 11:47:15 -0400746 temp >> 8, temp & 0xff,
David Brownell93f1a472006-11-16 23:34:58 -0800747 ignore_oc ? ", overcurrent ignored" : "");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100749 ehci_writel(ehci, INTR_MASK,
750 &ehci->regs->intr_enable); /* Turn On Interrupts */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751
David Brownell18807522005-11-23 15:45:37 -0800752 /* GRR this is run-once init(), being done every time the HC starts.
753 * So long as they're part of class devices, we can't do it init()
754 * since the class device isn't created that early.
755 */
756 create_debug_files(ehci);
Alan Stern57e06c12007-01-16 11:59:45 -0500757 create_companion_file(ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758
759 return 0;
760}
761
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762/*-------------------------------------------------------------------------*/
763
David Howells7d12e782006-10-05 14:55:46 +0100764static irqreturn_t ehci_irq (struct usb_hcd *hcd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765{
766 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
Alan Stern67b2e022008-11-12 17:04:53 -0500767 u32 status, masked_status, pcd_status = 0, cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 int bh;
769
770 spin_lock (&ehci->lock);
771
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100772 status = ehci_readl(ehci, &ehci->regs->status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773
774 /* e.g. cardbus physical eject */
775 if (status == ~(u32) 0) {
776 ehci_dbg (ehci, "device removed\n");
777 goto dead;
778 }
779
Alan Stern67b2e022008-11-12 17:04:53 -0500780 masked_status = status & INTR_MASK;
781 if (!masked_status) { /* irq sharing? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 spin_unlock(&ehci->lock);
783 return IRQ_NONE;
784 }
785
786 /* clear (just) interrupts */
Alan Stern67b2e022008-11-12 17:04:53 -0500787 ehci_writel(ehci, masked_status, &ehci->regs->status);
David Brownelle82cc122008-03-07 13:49:42 -0800788 cmd = ehci_readl(ehci, &ehci->regs->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 bh = 0;
790
David Brownell9776afc2008-02-01 11:42:05 -0800791#ifdef VERBOSE_DEBUG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792 /* unrequested/ignored: Frame List Rollover */
793 dbg_status (ehci, "irq", status);
794#endif
795
796 /* INT, ERR, and IAA interrupt rates can be throttled */
797
798 /* normal [4.15.1.2] or error [4.15.1.1] completion */
799 if (likely ((status & (STS_INT|STS_ERR)) != 0)) {
800 if (likely ((status & STS_ERR) == 0))
801 COUNT (ehci->stats.normal);
802 else
803 COUNT (ehci->stats.error);
804 bh = 1;
805 }
806
807 /* complete the unlinking of some qh [4.15.2.3] */
808 if (status & STS_IAA) {
David Brownelle82cc122008-03-07 13:49:42 -0800809 /* guard against (alleged) silicon errata */
810 if (cmd & CMD_IAAD) {
811 ehci_writel(ehci, cmd & ~CMD_IAAD,
812 &ehci->regs->command);
813 ehci_dbg(ehci, "IAA with IAAD still set?\n");
814 }
815 if (ehci->reclaim) {
816 COUNT(ehci->stats.reclaim);
817 end_unlink_async(ehci);
818 } else
819 ehci_dbg(ehci, "IAA with nothing to reclaim?\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820 }
821
822 /* remote wakeup [4.3.1] */
David Brownelld97cc2f2005-12-22 17:05:18 -0800823 if (status & STS_PCD) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 unsigned i = HCS_N_PORTS (ehci->hcs_params);
Alek Du5a9cdf32010-06-04 15:47:56 +0800825 u32 ppcd = 0;
David Brownelld1b18422008-03-05 23:37:52 -0800826
827 /* kick root hub later */
Marcelo Tosatti1d619f12007-01-21 19:45:59 -0200828 pcd_status = status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829
830 /* resume root hub? */
Alan Sterneafe5b92008-10-06 11:25:53 -0400831 if (!(cmd & CMD_RUN))
Alan Stern8c033562006-11-09 14:42:16 -0500832 usb_hcd_resume_root_hub(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833
Alek Du5a9cdf32010-06-04 15:47:56 +0800834 /* get per-port change detect bits */
835 if (ehci->has_ppcd)
836 ppcd = status >> 16;
837
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 while (i--) {
Alek Du5a9cdf32010-06-04 15:47:56 +0800839 int pstatus;
840
841 /* leverage per-port change bits feature */
842 if (ehci->has_ppcd && !(ppcd & (1 << i)))
843 continue;
844 pstatus = ehci_readl(ehci,
845 &ehci->regs->port_status[i]);
David Brownellb972b682006-06-30 02:34:42 -0700846
847 if (pstatus & PORT_OWNER)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 continue;
Alan Sterneafe5b92008-10-06 11:25:53 -0400849 if (!(test_bit(i, &ehci->suspended_ports) &&
850 ((pstatus & PORT_RESUME) ||
851 !(pstatus & PORT_SUSPEND)) &&
852 (pstatus & PORT_PE) &&
853 ehci->reset_done[i] == 0))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854 continue;
855
856 /* start 20 msec resume signaling from this port,
857 * and make khubd collect PORT_STAT_C_SUSPEND to
Alan Stern49d0f072010-01-08 11:18:38 -0500858 * stop that signaling. Use 5 ms extra for safety,
859 * like usb_port_resume() does.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860 */
Alan Stern49d0f072010-01-08 11:18:38 -0500861 ehci->reset_done[i] = jiffies + msecs_to_jiffies(25);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862 ehci_dbg (ehci, "port %d remote wakeup\n", i + 1);
Alan Stern61e8b852007-04-09 11:52:31 -0400863 mod_timer(&hcd->rh_timer, ehci->reset_done[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 }
865 }
866
867 /* PCI errors [4.15.2.4] */
868 if (unlikely ((status & STS_FATAL) != 0)) {
Alan Stern67b2e022008-11-12 17:04:53 -0500869 ehci_err(ehci, "fatal error\n");
Alan Sterneafe5b92008-10-06 11:25:53 -0400870 dbg_cmd(ehci, "fatal", cmd);
871 dbg_status(ehci, "fatal", status);
Alan Stern67b2e022008-11-12 17:04:53 -0500872 ehci_halt(ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873dead:
Alan Stern67b2e022008-11-12 17:04:53 -0500874 ehci_reset(ehci);
875 ehci_writel(ehci, 0, &ehci->regs->configured_flag);
876 /* generic layer kills/unlinks all urbs, then
877 * uses ehci_stop to clean up the rest
878 */
879 bh = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880 }
881
882 if (bh)
David Howells7d12e782006-10-05 14:55:46 +0100883 ehci_work (ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884 spin_unlock (&ehci->lock);
David Brownelld1b18422008-03-05 23:37:52 -0800885 if (pcd_status)
Marcelo Tosatti1d619f12007-01-21 19:45:59 -0200886 usb_hcd_poll_rh_status(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887 return IRQ_HANDLED;
888}
889
890/*-------------------------------------------------------------------------*/
891
892/*
893 * non-error returns are a promise to giveback() the urb later
894 * we drop ownership so next owner (or urb unlink) can get it
895 *
896 * urb + dev is in hcd.self.controller.urb_list
897 * we're queueing TDs onto software and hardware lists
898 *
899 * hcd-specific init for hcpriv hasn't been done yet
900 *
901 * NOTE: control, bulk, and interrupt share the same code to append TDs
902 * to a (possibly active) QH, and the same QH scanning code.
903 */
904static int ehci_urb_enqueue (
905 struct usb_hcd *hcd,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906 struct urb *urb,
Al Viro55016f12005-10-21 03:21:58 -0400907 gfp_t mem_flags
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908) {
909 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
910 struct list_head qtd_list;
911
912 INIT_LIST_HEAD (&qtd_list);
913
914 switch (usb_pipetype (urb->pipe)) {
David Brownell25b70a82008-03-04 15:11:07 -0800915 case PIPE_CONTROL:
916 /* qh_completions() code doesn't handle all the fault cases
917 * in multi-TD control transfers. Even 1KB is rare anyway.
918 */
919 if (urb->transfer_buffer_length > (16 * 1024))
920 return -EMSGSIZE;
921 /* FALLTHROUGH */
922 /* case PIPE_BULK: */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 default:
924 if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags))
925 return -ENOMEM;
Alan Sterne9df41c2007-08-08 11:48:02 -0400926 return submit_async(ehci, urb, &qtd_list, mem_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927
928 case PIPE_INTERRUPT:
929 if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags))
930 return -ENOMEM;
Alan Sterne9df41c2007-08-08 11:48:02 -0400931 return intr_submit(ehci, urb, &qtd_list, mem_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932
933 case PIPE_ISOCHRONOUS:
934 if (urb->dev->speed == USB_SPEED_HIGH)
935 return itd_submit (ehci, urb, mem_flags);
936 else
937 return sitd_submit (ehci, urb, mem_flags);
938 }
939}
940
941static void unlink_async (struct ehci_hcd *ehci, struct ehci_qh *qh)
942{
Alan Stern07d29b62007-12-11 16:05:30 -0500943 /* failfast */
David Brownelle82cc122008-03-07 13:49:42 -0800944 if (!HC_IS_RUNNING(ehci_to_hcd(ehci)->state) && ehci->reclaim)
Alan Stern07d29b62007-12-11 16:05:30 -0500945 end_unlink_async(ehci);
946
Alan Stern3a444942009-08-19 12:22:06 -0400947 /* If the QH isn't linked then there's nothing we can do
948 * unless we were called during a giveback, in which case
949 * qh_completions() has to deal with it.
950 */
951 if (qh->qh_state != QH_STATE_LINKED) {
952 if (qh->qh_state == QH_STATE_COMPLETING)
953 qh->needs_rescan = 1;
954 return;
955 }
Alan Stern07d29b62007-12-11 16:05:30 -0500956
957 /* defer till later if busy */
Alan Stern3a444942009-08-19 12:22:06 -0400958 if (ehci->reclaim) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959 struct ehci_qh *last;
960
961 for (last = ehci->reclaim;
962 last->reclaim;
963 last = last->reclaim)
964 continue;
965 qh->qh_state = QH_STATE_UNLINK_WAIT;
966 last->reclaim = qh;
967
Alan Stern07d29b62007-12-11 16:05:30 -0500968 /* start IAA cycle */
969 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970 start_unlink_async (ehci, qh);
971}
972
973/* remove from hardware lists
974 * completions normally happen asynchronously
975 */
976
Alan Sterne9df41c2007-08-08 11:48:02 -0400977static int ehci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978{
979 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
980 struct ehci_qh *qh;
981 unsigned long flags;
Alan Sterne9df41c2007-08-08 11:48:02 -0400982 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983
984 spin_lock_irqsave (&ehci->lock, flags);
Alan Sterne9df41c2007-08-08 11:48:02 -0400985 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
986 if (rc)
987 goto done;
988
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989 switch (usb_pipetype (urb->pipe)) {
990 // case PIPE_CONTROL:
991 // case PIPE_BULK:
992 default:
993 qh = (struct ehci_qh *) urb->hcpriv;
994 if (!qh)
995 break;
Alan Stern07d29b62007-12-11 16:05:30 -0500996 switch (qh->qh_state) {
997 case QH_STATE_LINKED:
998 case QH_STATE_COMPLETING:
999 unlink_async(ehci, qh);
1000 break;
1001 case QH_STATE_UNLINK:
1002 case QH_STATE_UNLINK_WAIT:
1003 /* already started */
1004 break;
1005 case QH_STATE_IDLE:
Alan Stern7a0f0d92009-07-31 10:40:22 -04001006 /* QH might be waiting for a Clear-TT-Buffer */
1007 qh_completions(ehci, qh);
Alan Stern07d29b62007-12-11 16:05:30 -05001008 break;
1009 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010 break;
1011
1012 case PIPE_INTERRUPT:
1013 qh = (struct ehci_qh *) urb->hcpriv;
1014 if (!qh)
1015 break;
1016 switch (qh->qh_state) {
1017 case QH_STATE_LINKED:
Alan Sterna448c9d2009-08-19 12:22:44 -04001018 case QH_STATE_COMPLETING:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019 intr_deschedule (ehci, qh);
Alan Sterna448c9d2009-08-19 12:22:44 -04001020 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 case QH_STATE_IDLE:
David Howells7d12e782006-10-05 14:55:46 +01001022 qh_completions (ehci, qh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023 break;
1024 default:
1025 ehci_dbg (ehci, "bogus qh %p state %d\n",
1026 qh, qh->qh_state);
1027 goto done;
1028 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029 break;
1030
1031 case PIPE_ISOCHRONOUS:
1032 // itd or sitd ...
1033
1034 // wait till next completion, do it then.
1035 // completion irqs can wait up to 1024 msec,
1036 break;
1037 }
1038done:
1039 spin_unlock_irqrestore (&ehci->lock, flags);
Alan Sterne9df41c2007-08-08 11:48:02 -04001040 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041}
1042
1043/*-------------------------------------------------------------------------*/
1044
1045// bulk qh holds the data toggle
1046
1047static void
1048ehci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep)
1049{
1050 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
1051 unsigned long flags;
1052 struct ehci_qh *qh, *tmp;
1053
1054 /* ASSERT: any requests/urbs are being unlinked */
1055 /* ASSERT: nobody can be submitting urbs for this any more */
1056
1057rescan:
1058 spin_lock_irqsave (&ehci->lock, flags);
1059 qh = ep->hcpriv;
1060 if (!qh)
1061 goto done;
1062
1063 /* endpoints can be iso streams. for now, we don't
1064 * accelerate iso completions ... so spin a while.
1065 */
Clemens Ladisch1082f572010-03-01 17:18:56 +01001066 if (qh->hw == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067 ehci_vdbg (ehci, "iso delay\n");
1068 goto idle_timeout;
1069 }
1070
1071 if (!HC_IS_RUNNING (hcd->state))
1072 qh->qh_state = QH_STATE_IDLE;
1073 switch (qh->qh_state) {
1074 case QH_STATE_LINKED:
Alan Stern3a444942009-08-19 12:22:06 -04001075 case QH_STATE_COMPLETING:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076 for (tmp = ehci->async->qh_next.qh;
1077 tmp && tmp != qh;
1078 tmp = tmp->qh_next.qh)
1079 continue;
Alan Stern02e2c512010-11-16 10:57:37 -05001080 /* periodic qh self-unlinks on empty, and a COMPLETING qh
1081 * may already be unlinked.
1082 */
1083 if (tmp)
1084 unlink_async(ehci, qh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085 /* FALL THROUGH */
1086 case QH_STATE_UNLINK: /* wait for hw to finish? */
Alan Stern07d29b62007-12-11 16:05:30 -05001087 case QH_STATE_UNLINK_WAIT:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088idle_timeout:
1089 spin_unlock_irqrestore (&ehci->lock, flags);
Nishanth Aravamudan22c43862005-08-15 11:30:11 -07001090 schedule_timeout_uninterruptible(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 goto rescan;
1092 case QH_STATE_IDLE: /* fully unlinked */
Alan Stern914b7012009-06-29 10:47:30 -04001093 if (qh->clearing_tt)
1094 goto idle_timeout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 if (list_empty (&qh->qtd_list)) {
1096 qh_put (qh);
1097 break;
1098 }
1099 /* else FALL THROUGH */
1100 default:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101 /* caller was supposed to have unlinked any requests;
1102 * that's not our job. just leak this memory.
1103 */
1104 ehci_err (ehci, "qh %p (#%02x) state %d%s\n",
1105 qh, ep->desc.bEndpointAddress, qh->qh_state,
1106 list_empty (&qh->qtd_list) ? "" : "(has tds)");
1107 break;
1108 }
1109 ep->hcpriv = NULL;
1110done:
1111 spin_unlock_irqrestore (&ehci->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112}
1113
Alan Sternb18ffd42009-05-27 18:21:56 -04001114static void
1115ehci_endpoint_reset(struct usb_hcd *hcd, struct usb_host_endpoint *ep)
1116{
1117 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1118 struct ehci_qh *qh;
1119 int eptype = usb_endpoint_type(&ep->desc);
Alan Sterna455212d2009-06-11 14:56:22 -04001120 int epnum = usb_endpoint_num(&ep->desc);
1121 int is_out = usb_endpoint_dir_out(&ep->desc);
1122 unsigned long flags;
Alan Sternb18ffd42009-05-27 18:21:56 -04001123
1124 if (eptype != USB_ENDPOINT_XFER_BULK && eptype != USB_ENDPOINT_XFER_INT)
1125 return;
1126
Alan Sterna455212d2009-06-11 14:56:22 -04001127 spin_lock_irqsave(&ehci->lock, flags);
Alan Sternb18ffd42009-05-27 18:21:56 -04001128 qh = ep->hcpriv;
1129
1130 /* For Bulk and Interrupt endpoints we maintain the toggle state
1131 * in the hardware; the toggle bits in udev aren't used at all.
1132 * When an endpoint is reset by usb_clear_halt() we must reset
1133 * the toggle bit in the QH.
1134 */
1135 if (qh) {
Alan Sterna455212d2009-06-11 14:56:22 -04001136 usb_settoggle(qh->dev, epnum, is_out, 0);
Alan Sternb18ffd42009-05-27 18:21:56 -04001137 if (!list_empty(&qh->qtd_list)) {
1138 WARN_ONCE(1, "clear_halt for a busy endpoint\n");
Alan Stern3a444942009-08-19 12:22:06 -04001139 } else if (qh->qh_state == QH_STATE_LINKED ||
1140 qh->qh_state == QH_STATE_COMPLETING) {
Alan Sterna455212d2009-06-11 14:56:22 -04001141
1142 /* The toggle value in the QH can't be updated
1143 * while the QH is active. Unlink it now;
1144 * re-linking will call qh_refresh().
Alan Sternb18ffd42009-05-27 18:21:56 -04001145 */
Alan Sterna448c9d2009-08-19 12:22:44 -04001146 if (eptype == USB_ENDPOINT_XFER_BULK)
Alan Sterna455212d2009-06-11 14:56:22 -04001147 unlink_async(ehci, qh);
Alan Sterna448c9d2009-08-19 12:22:44 -04001148 else
Alan Sterna455212d2009-06-11 14:56:22 -04001149 intr_deschedule(ehci, qh);
Alan Sternb18ffd42009-05-27 18:21:56 -04001150 }
1151 }
Alan Sterna455212d2009-06-11 14:56:22 -04001152 spin_unlock_irqrestore(&ehci->lock, flags);
Alan Sternb18ffd42009-05-27 18:21:56 -04001153}
1154
Matt Porter7ff71d62005-09-22 22:31:15 -07001155static int ehci_get_frame (struct usb_hcd *hcd)
1156{
1157 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +11001158 return (ehci_readl(ehci, &ehci->regs->frame_index) >> 3) %
1159 ehci->periodic_size;
Matt Porter7ff71d62005-09-22 22:31:15 -07001160}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001161
1162/*-------------------------------------------------------------------------*/
1163
Alan Stern2b70f072008-10-02 11:47:15 -04001164MODULE_DESCRIPTION(DRIVER_DESC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165MODULE_AUTHOR (DRIVER_AUTHOR);
1166MODULE_LICENSE ("GPL");
1167
Matt Porter7ff71d62005-09-22 22:31:15 -07001168#ifdef CONFIG_PCI
1169#include "ehci-pci.c"
Kumar Gala01cced22006-04-11 10:07:16 -05001170#define PCI_DRIVER ehci_pci_driver
Matt Porter7ff71d62005-09-22 22:31:15 -07001171#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172
Li Yangba029782007-05-11 17:09:55 +08001173#ifdef CONFIG_USB_EHCI_FSL
Randy Vinson80cb9ae2006-01-20 13:53:38 -08001174#include "ehci-fsl.c"
Kumar Gala01cced22006-04-11 10:07:16 -05001175#define PLATFORM_DRIVER ehci_fsl_driver
Randy Vinson80cb9ae2006-01-20 13:53:38 -08001176#endif
1177
Daniel Mack7e8d5cd2009-10-28 01:14:59 +01001178#ifdef CONFIG_USB_EHCI_MXC
1179#include "ehci-mxc.c"
1180#define PLATFORM_DRIVER ehci_mxc_driver
1181#endif
1182
Yoshihiro Shimoda60b0bf02011-03-01 16:58:37 +09001183#ifdef CONFIG_USB_EHCI_SH
Paul Mundt63c84552010-11-01 17:03:27 -04001184#include "ehci-sh.c"
1185#define PLATFORM_DRIVER ehci_hcd_sh_driver
1186#endif
1187
Ralf Baechledfbaa7d2006-06-03 23:58:55 +01001188#ifdef CONFIG_SOC_AU1200
Jordan Crouse76fa9a22006-01-20 14:06:09 -08001189#include "ehci-au1xxx.c"
Kumar Gala01cced22006-04-11 10:07:16 -05001190#define PLATFORM_DRIVER ehci_hcd_au1xxx_driver
Jordan Crouse76fa9a22006-01-20 14:06:09 -08001191#endif
1192
Keshava Munegowda7f124f42010-11-21 23:23:41 +05301193#ifdef CONFIG_USB_EHCI_HCD_OMAP
Felipe Balbi54ab2b02009-10-14 11:44:14 +03001194#include "ehci-omap.c"
1195#define PLATFORM_DRIVER ehci_hcd_omap_driver
1196#endif
1197
Geoff Levandad75a412007-01-15 20:11:47 -08001198#ifdef CONFIG_PPC_PS3
1199#include "ehci-ps3.c"
Geoff Levand7a4eb7f2007-06-05 20:04:35 -07001200#define PS3_SYSTEM_BUS_DRIVER ps3_ehci_driver
Geoff Levandad75a412007-01-15 20:11:47 -08001201#endif
1202
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001203#ifdef CONFIG_USB_EHCI_HCD_PPC_OF
1204#include "ehci-ppc-of.c"
1205#define OF_PLATFORM_DRIVER ehci_hcd_ppc_of_driver
1206#endif
1207
Julie Zhu08d3c182009-09-21 16:08:19 -06001208#ifdef CONFIG_XPS_USB_HCD_XILINX
1209#include "ehci-xilinx-of.c"
Grant Likely1f23b2d2010-06-02 13:53:17 -06001210#define XILINX_OF_PLATFORM_DRIVER ehci_hcd_xilinx_of_driver
Julie Zhu08d3c182009-09-21 16:08:19 -06001211#endif
1212
Lennert Buytenhek705a7522008-03-27 14:51:40 -04001213#ifdef CONFIG_PLAT_ORION
Tzachi Perelsteine96ffe22007-12-01 11:07:04 -05001214#include "ehci-orion.c"
1215#define PLATFORM_DRIVER ehci_orion_driver
1216#endif
1217
Vladimir Barinov91bc4d32007-12-30 15:21:11 -08001218#ifdef CONFIG_ARCH_IXP4XX
1219#include "ehci-ixp4xx.c"
1220#define PLATFORM_DRIVER ixp4xx_ehci_driver
1221#endif
1222
Wan ZongShun586dfc82009-06-13 09:14:28 +08001223#ifdef CONFIG_USB_W90X900_EHCI
1224#include "ehci-w90x900.c"
1225#define PLATFORM_DRIVER ehci_hcd_w90x900_driver
1226#endif
1227
Nicolas Ferre501c9c02009-07-27 14:47:40 -07001228#ifdef CONFIG_ARCH_AT91
1229#include "ehci-atmel.c"
1230#define PLATFORM_DRIVER ehci_atmel_driver
1231#endif
1232
David Daney1643acc2010-10-08 14:47:52 -07001233#ifdef CONFIG_USB_OCTEON_EHCI
1234#include "ehci-octeon.c"
1235#define PLATFORM_DRIVER ehci_octeon_driver
1236#endif
1237
Mac Lin760efe62010-11-25 23:58:00 +08001238#ifdef CONFIG_USB_CNS3XXX_EHCI
1239#include "ehci-cns3xxx.c"
1240#define PLATFORM_DRIVER cns3xxx_ehci_driver
1241#endif
1242
Alexey Charkovad78aca2010-11-07 19:28:55 +03001243#ifdef CONFIG_ARCH_VT8500
1244#include "ehci-vt8500.c"
1245#define PLATFORM_DRIVER vt8500_ehci_driver
1246#endif
1247
Deepak Sikric8c38de2010-11-10 14:33:18 +05301248#ifdef CONFIG_PLAT_SPEAR
1249#include "ehci-spear.c"
1250#define PLATFORM_DRIVER spear_ehci_hcd_driver
1251#endif
1252
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +05301253#ifdef CONFIG_USB_EHCI_MSM
1254#include "ehci-msm.c"
1255#define PLATFORM_DRIVER ehci_msm_driver
1256#endif
1257
Anoop22ced6872011-02-24 19:26:28 +05301258#ifdef CONFIG_USB_EHCI_HCD_PMC_MSP
1259#include "ehci-pmcmsp.c"
1260#define PLATFORM_DRIVER ehci_hcd_msp_driver
1261#endif
1262
Benoit Goby79ad3b52011-03-09 16:28:56 -08001263#ifdef CONFIG_USB_EHCI_TEGRA
1264#include "ehci-tegra.c"
1265#define PLATFORM_DRIVER tegra_ehci_driver
1266#endif
1267
Joonyoung Shim1bcc5aa2011-04-08 14:08:50 +09001268#ifdef CONFIG_USB_EHCI_S5P
1269#include "ehci-s5p.c"
1270#define PLATFORM_DRIVER s5p_ehci_driver
1271#endif
1272
Gabor Juhos502fa842011-04-13 10:54:22 +02001273#ifdef CONFIG_USB_EHCI_ATH79
1274#include "ehci-ath79.c"
1275#define PLATFORM_DRIVER ehci_ath79_driver
1276#endif
1277
Jan Andersson9be03922011-05-03 20:11:58 +02001278#ifdef CONFIG_SPARC_LEON
1279#include "ehci-grlib.c"
1280#define PLATFORM_DRIVER ehci_grlib_driver
1281#endif
1282
Geoff Levandad75a412007-01-15 20:11:47 -08001283#if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
Grant Likely1f23b2d2010-06-02 13:53:17 -06001284 !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
1285 !defined(XILINX_OF_PLATFORM_DRIVER)
Matt Porter7ff71d62005-09-22 22:31:15 -07001286#error "missing bus glue for ehci-hcd"
1287#endif
Kumar Gala01cced22006-04-11 10:07:16 -05001288
1289static int __init ehci_hcd_init(void)
1290{
1291 int retval = 0;
1292
Alan Stern2b70f072008-10-02 11:47:15 -04001293 if (usb_disabled())
1294 return -ENODEV;
1295
1296 printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name);
Alan Stern9beeee62008-10-02 11:48:13 -04001297 set_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
1298 if (test_bit(USB_UHCI_LOADED, &usb_hcds_loaded) ||
1299 test_bit(USB_OHCI_LOADED, &usb_hcds_loaded))
1300 printk(KERN_WARNING "Warning! ehci_hcd should always be loaded"
1301 " before uhci_hcd and ohci_hcd, not after\n");
1302
Kumar Gala01cced22006-04-11 10:07:16 -05001303 pr_debug("%s: block sizes: qh %Zd qtd %Zd itd %Zd sitd %Zd\n",
1304 hcd_name,
1305 sizeof(struct ehci_qh), sizeof(struct ehci_qtd),
1306 sizeof(struct ehci_itd), sizeof(struct ehci_sitd));
1307
Tony Jones694cc202007-09-11 14:07:31 -07001308#ifdef DEBUG
Greg Kroah-Hartman08f4e582009-04-24 15:13:18 -07001309 ehci_debug_root = debugfs_create_dir("ehci", usb_debug_root);
Alan Stern9beeee62008-10-02 11:48:13 -04001310 if (!ehci_debug_root) {
1311 retval = -ENOENT;
1312 goto err_debug;
1313 }
Tony Jones694cc202007-09-11 14:07:31 -07001314#endif
1315
Kumar Gala01cced22006-04-11 10:07:16 -05001316#ifdef PLATFORM_DRIVER
1317 retval = platform_driver_register(&PLATFORM_DRIVER);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001318 if (retval < 0)
1319 goto clean0;
Kumar Gala01cced22006-04-11 10:07:16 -05001320#endif
1321
1322#ifdef PCI_DRIVER
1323 retval = pci_register_driver(&PCI_DRIVER);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001324 if (retval < 0)
1325 goto clean1;
Geoff Levandad75a412007-01-15 20:11:47 -08001326#endif
1327
1328#ifdef PS3_SYSTEM_BUS_DRIVER
Geoff Levand7a4eb7f2007-06-05 20:04:35 -07001329 retval = ps3_ehci_driver_register(&PS3_SYSTEM_BUS_DRIVER);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001330 if (retval < 0)
1331 goto clean2;
Kumar Gala01cced22006-04-11 10:07:16 -05001332#endif
1333
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001334#ifdef OF_PLATFORM_DRIVER
Grant Likelyd35fb642011-02-22 21:08:34 -07001335 retval = platform_driver_register(&OF_PLATFORM_DRIVER);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001336 if (retval < 0)
1337 goto clean3;
1338#endif
Grant Likely1f23b2d2010-06-02 13:53:17 -06001339
1340#ifdef XILINX_OF_PLATFORM_DRIVER
Grant Likelyd35fb642011-02-22 21:08:34 -07001341 retval = platform_driver_register(&XILINX_OF_PLATFORM_DRIVER);
Grant Likely1f23b2d2010-06-02 13:53:17 -06001342 if (retval < 0)
1343 goto clean4;
1344#endif
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001345 return retval;
1346
Grant Likely1f23b2d2010-06-02 13:53:17 -06001347#ifdef XILINX_OF_PLATFORM_DRIVER
Grant Likelyd35fb642011-02-22 21:08:34 -07001348 /* platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER); */
Grant Likely1f23b2d2010-06-02 13:53:17 -06001349clean4:
1350#endif
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001351#ifdef OF_PLATFORM_DRIVER
Grant Likelyd35fb642011-02-22 21:08:34 -07001352 platform_driver_unregister(&OF_PLATFORM_DRIVER);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001353clean3:
1354#endif
1355#ifdef PS3_SYSTEM_BUS_DRIVER
1356 ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1357clean2:
1358#endif
1359#ifdef PCI_DRIVER
1360 pci_unregister_driver(&PCI_DRIVER);
1361clean1:
1362#endif
1363#ifdef PLATFORM_DRIVER
1364 platform_driver_unregister(&PLATFORM_DRIVER);
1365clean0:
1366#endif
1367#ifdef DEBUG
1368 debugfs_remove(ehci_debug_root);
1369 ehci_debug_root = NULL;
Alan Stern9beeee62008-10-02 11:48:13 -04001370err_debug:
Linus Torvaldsa9b61482008-10-20 14:23:29 -07001371#endif
Alan Stern9beeee62008-10-02 11:48:13 -04001372 clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
Kumar Gala01cced22006-04-11 10:07:16 -05001373 return retval;
1374}
1375module_init(ehci_hcd_init);
1376
1377static void __exit ehci_hcd_cleanup(void)
1378{
Grant Likely1f23b2d2010-06-02 13:53:17 -06001379#ifdef XILINX_OF_PLATFORM_DRIVER
Grant Likelyd35fb642011-02-22 21:08:34 -07001380 platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER);
Grant Likely1f23b2d2010-06-02 13:53:17 -06001381#endif
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001382#ifdef OF_PLATFORM_DRIVER
Grant Likelyd35fb642011-02-22 21:08:34 -07001383 platform_driver_unregister(&OF_PLATFORM_DRIVER);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001384#endif
Kumar Gala01cced22006-04-11 10:07:16 -05001385#ifdef PLATFORM_DRIVER
1386 platform_driver_unregister(&PLATFORM_DRIVER);
1387#endif
1388#ifdef PCI_DRIVER
1389 pci_unregister_driver(&PCI_DRIVER);
1390#endif
Geoff Levandad75a412007-01-15 20:11:47 -08001391#ifdef PS3_SYSTEM_BUS_DRIVER
Geoff Levand7a4eb7f2007-06-05 20:04:35 -07001392 ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
Geoff Levandad75a412007-01-15 20:11:47 -08001393#endif
Tony Jones694cc202007-09-11 14:07:31 -07001394#ifdef DEBUG
1395 debugfs_remove(ehci_debug_root);
1396#endif
Alan Stern9beeee62008-10-02 11:48:13 -04001397 clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
Kumar Gala01cced22006-04-11 10:07:16 -05001398}
1399module_exit(ehci_hcd_cleanup);
1400