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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>
Alan Sternd58b4bc2012-07-11 11:21:54 -040033#include <linux/hrtimer.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <linux/list.h>
35#include <linux/interrupt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include <linux/usb.h>
Eric Lescouet27729aa2010-04-24 23:21:52 +020037#include <linux/usb/hcd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include <linux/moduleparam.h>
39#include <linux/dma-mapping.h>
Tony Jones694cc202007-09-11 14:07:31 -070040#include <linux/debugfs.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090041#include <linux/slab.h>
Alek Duaa4d8342010-06-04 15:47:54 +080042#include <linux/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <asm/byteorder.h>
45#include <asm/io.h>
46#include <asm/irq.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#include <asm/unaligned.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
Geoff Levanddf7c1ca2011-11-30 16:40:57 -080049#if defined(CONFIG_PPC_PS3)
50#include <asm/firmware.h>
51#endif
52
Linus Torvalds1da177e2005-04-16 15:20:36 -070053/*-------------------------------------------------------------------------*/
54
55/*
56 * EHCI hc_driver implementation ... experimental, incomplete.
57 * Based on the final 1.0 register interface specification.
58 *
59 * USB 2.0 shows up in upcoming www.pcmcia.org technology.
60 * First was PCMCIA, like ISA; then CardBus, which is PCI.
61 * Next comes "CardBay", using USB 2.0 signals.
62 *
63 * Contains additional contributions by Brad Hards, Rory Bolt, and others.
64 * Special thanks to Intel and VIA for providing host controllers to
65 * test this driver on, and Cypress (including In-System Design) for
66 * providing early devices for those host controllers to talk to!
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 */
68
Linus Torvalds1da177e2005-04-16 15:20:36 -070069#define DRIVER_AUTHOR "David Brownell"
70#define DRIVER_DESC "USB 2.0 'Enhanced' Host Controller (EHCI) Driver"
71
72static const char hcd_name [] = "ehci_hcd";
73
74
David Brownell9776afc2008-02-01 11:42:05 -080075#undef VERBOSE_DEBUG
Linus Torvalds1da177e2005-04-16 15:20:36 -070076#undef EHCI_URB_TRACE
77
78#ifdef DEBUG
79#define EHCI_STATS
80#endif
81
82/* magic numbers that can affect system performance */
83#define EHCI_TUNE_CERR 3 /* 0-3 qtd retries; 0 == don't stop */
84#define EHCI_TUNE_RL_HS 4 /* nak throttle; see 4.9 */
85#define EHCI_TUNE_RL_TT 0
86#define EHCI_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */
87#define EHCI_TUNE_MULT_TT 1
Alan Sternffda0802010-07-14 11:03:46 -040088/*
89 * Some drivers think it's safe to schedule isochronous transfers more than
90 * 256 ms into the future (partly as a result of an old bug in the scheduling
91 * code). In an attempt to avoid trouble, we will use a minimum scheduling
92 * length of 512 frames instead of 256.
93 */
94#define EHCI_TUNE_FLS 1 /* (medium) 512-frame schedule */
Linus Torvalds1da177e2005-04-16 15:20:36 -070095
Linus Torvalds1da177e2005-04-16 15:20:36 -070096#define EHCI_IO_JIFFIES (HZ/10) /* io watchdog > irq_thresh */
Linus Torvalds1da177e2005-04-16 15:20:36 -070097
98/* Initial IRQ latency: faster than hw default */
99static int log2_irq_thresh = 0; // 0 to 6
100module_param (log2_irq_thresh, int, S_IRUGO);
101MODULE_PARM_DESC (log2_irq_thresh, "log2 IRQ latency, 1-64 microframes");
102
103/* initial park setting: slower than hw default */
104static unsigned park = 0;
105module_param (park, uint, S_IRUGO);
106MODULE_PARM_DESC (park, "park setting; 1-3 back-to-back async packets");
107
David Brownell93f1a472006-11-16 23:34:58 -0800108/* for flakey hardware, ignore overcurrent indicators */
Rusty Russell90ab5ee2012-01-13 09:32:20 +1030109static bool ignore_oc = 0;
David Brownell93f1a472006-11-16 23:34:58 -0800110module_param (ignore_oc, bool, S_IRUGO);
111MODULE_PARM_DESC (ignore_oc, "ignore bogus hardware overcurrent indications");
112
Alek Du48f24972010-06-04 15:47:55 +0800113/* for link power management(LPM) feature */
114static unsigned int hird;
115module_param(hird, int, S_IRUGO);
Niels de Voscc556872011-05-31 23:00:10 +0100116MODULE_PARM_DESC(hird, "host initiated resume duration, +1 for each 75us");
Alek Du48f24972010-06-04 15:47:55 +0800117
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118#define INTR_MASK (STS_IAA | STS_FATAL | STS_PCD | STS_ERR | STS_INT)
119
120/*-------------------------------------------------------------------------*/
121
122#include "ehci.h"
123#include "ehci-dbg.c"
Andiry Xuad935622011-03-01 14:57:05 +0800124#include "pci-quirks.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125
126/*-------------------------------------------------------------------------*/
127
Alan Sternbc298472009-02-11 14:26:38 -0500128static void
129timer_action(struct ehci_hcd *ehci, enum ehci_timer_action action)
130{
Alan Sternbc298472009-02-11 14:26:38 -0500131 if (!test_and_set_bit(action, &ehci->actions)) {
132 unsigned long t;
133
134 switch (action) {
135 case TIMER_IO_WATCHDOG:
Alek Du403dbd32009-07-13 17:30:41 +0800136 if (!ehci->need_io_watchdog)
137 return;
Alan Sternbc298472009-02-11 14:26:38 -0500138 t = EHCI_IO_JIFFIES;
139 break;
Alan Sternbc298472009-02-11 14:26:38 -0500140 }
141 mod_timer(&ehci->watchdog, t + jiffies);
142 }
143}
144
145/*-------------------------------------------------------------------------*/
146
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147/*
148 * handshake - spin reading hc until handshake completes or fails
149 * @ptr: address of hc register to be read
150 * @mask: bits to look at in result of read
151 * @done: value of those bits when handshake succeeds
152 * @usec: timeout in microseconds
153 *
154 * Returns negative errno, or zero on success
155 *
156 * Success happens when the "mask" bits have the specified value (hardware
157 * handshake done). There are two failure modes: "usec" have passed (major
158 * hardware flakeout), or the register reads as all-ones (hardware removed).
159 *
160 * That last failure should_only happen in cases like physical cardbus eject
161 * before driver shutdown. But it also seems to be caused by bugs in cardbus
162 * bridge shutdown: shutting down the bridge before the devices using it.
163 */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100164static int handshake (struct ehci_hcd *ehci, void __iomem *ptr,
165 u32 mask, u32 done, int usec)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166{
167 u32 result;
168
169 do {
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100170 result = ehci_readl(ehci, ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 if (result == ~(u32)0) /* card removed */
172 return -ENODEV;
173 result &= mask;
174 if (result == done)
175 return 0;
176 udelay (1);
177 usec--;
178 } while (usec > 0);
179 return -ETIMEDOUT;
180}
181
Matthieu CASTET65fd4272010-09-06 18:26:56 +0200182/* check TDI/ARC silicon is in host mode */
183static int tdi_in_host_mode (struct ehci_hcd *ehci)
184{
Matthieu CASTET65fd4272010-09-06 18:26:56 +0200185 u32 tmp;
186
Alan Sterna46af4e2012-06-25 12:19:03 -0400187 tmp = ehci_readl(ehci, &ehci->regs->usbmode);
Matthieu CASTET65fd4272010-09-06 18:26:56 +0200188 return (tmp & 3) == USBMODE_CM_HC;
189}
190
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191/* force HC to halt state from unknown (EHCI spec section 2.3) */
192static int ehci_halt (struct ehci_hcd *ehci)
193{
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100194 u32 temp = ehci_readl(ehci, &ehci->regs->status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195
David Brownell72f30b62005-09-27 10:19:39 -0700196 /* disable any irqs left enabled by previous code */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100197 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
David Brownell72f30b62005-09-27 10:19:39 -0700198
Matthieu CASTET65fd4272010-09-06 18:26:56 +0200199 if (ehci_is_TDI(ehci) && tdi_in_host_mode(ehci) == 0) {
200 return 0;
201 }
202
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 if ((temp & STS_HALT) != 0)
204 return 0;
205
Alan Stern3d9545c2012-04-23 13:54:36 -0400206 /*
207 * This routine gets called during probe before ehci->command
208 * has been initialized, so we can't rely on its value.
209 */
210 ehci->command &= ~CMD_RUN;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100211 temp = ehci_readl(ehci, &ehci->regs->command);
Alan Stern3d9545c2012-04-23 13:54:36 -0400212 temp &= ~(CMD_RUN | CMD_IAAD);
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100213 ehci_writel(ehci, temp, &ehci->regs->command);
214 return handshake (ehci, &ehci->regs->status,
215 STS_HALT, STS_HALT, 16 * 125);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216}
217
218/* put TDI/ARC silicon into EHCI mode */
219static void tdi_reset (struct ehci_hcd *ehci)
220{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 u32 tmp;
222
Alan Sterna46af4e2012-06-25 12:19:03 -0400223 tmp = ehci_readl(ehci, &ehci->regs->usbmode);
Vladimir Barinovd23a1372007-05-23 20:07:48 +0400224 tmp |= USBMODE_CM_HC;
225 /* The default byte access to MMR space is LE after
226 * controller reset. Set the required endian mode
227 * for transfer buffers to match the host microprocessor
228 */
229 if (ehci_big_endian_mmio(ehci))
230 tmp |= USBMODE_BE;
Alan Sterna46af4e2012-06-25 12:19:03 -0400231 ehci_writel(ehci, tmp, &ehci->regs->usbmode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232}
233
234/* reset a non-running (STS_HALT == 1) controller */
235static int ehci_reset (struct ehci_hcd *ehci)
236{
237 int retval;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100238 u32 command = ehci_readl(ehci, &ehci->regs->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239
Jason Wessel8d053c72009-08-20 15:39:54 -0500240 /* If the EHCI debug controller is active, special care must be
241 * taken before and after a host controller reset */
242 if (ehci->debug && !dbgp_reset_prep())
243 ehci->debug = NULL;
244
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 command |= CMD_RESET;
246 dbg_cmd (ehci, "reset", command);
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100247 ehci_writel(ehci, command, &ehci->regs->command);
Alan Sterne8799902011-08-18 16:31:30 -0400248 ehci->rh_state = EHCI_RH_HALTED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 ehci->next_statechange = jiffies;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100250 retval = handshake (ehci, &ehci->regs->command,
251 CMD_RESET, 0, 250 * 1000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252
Alek Du331ac6b2009-07-13 12:41:20 +0800253 if (ehci->has_hostpc) {
254 ehci_writel(ehci, USBMODE_EX_HC | USBMODE_EX_VBPS,
Alan Sterna46af4e2012-06-25 12:19:03 -0400255 &ehci->regs->usbmode_ex);
256 ehci_writel(ehci, TXFIFO_DEFAULT, &ehci->regs->txfill_tuning);
Alek Du331ac6b2009-07-13 12:41:20 +0800257 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 if (retval)
259 return retval;
260
261 if (ehci_is_TDI(ehci))
262 tdi_reset (ehci);
263
Jason Wessel8d053c72009-08-20 15:39:54 -0500264 if (ehci->debug)
265 dbgp_external_startup();
266
Alan Sterna448e4d2012-04-03 15:24:30 -0400267 ehci->port_c_suspend = ehci->suspended_ports =
268 ehci->resuming_ports = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 return retval;
270}
271
272/* idle the controller (from running) */
273static void ehci_quiesce (struct ehci_hcd *ehci)
274{
275 u32 temp;
276
Alan Sterne8799902011-08-18 16:31:30 -0400277 if (ehci->rh_state != EHCI_RH_RUNNING)
Alan Sternc0c53db2012-07-11 11:21:48 -0400278 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279
280 /* wait for any schedule enables/disables to take effect */
Alan Stern3d9545c2012-04-23 13:54:36 -0400281 temp = (ehci->command << 10) & (STS_ASS | STS_PSS);
Alan Stern9671cd72012-07-11 11:22:16 -0400282 handshake(ehci, &ehci->regs->status, STS_ASS | STS_PSS, temp, 16 * 125);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283
284 /* then disable anything that's still active */
Alan Stern3d9545c2012-04-23 13:54:36 -0400285 ehci->command &= ~(CMD_ASE | CMD_PSE);
286 ehci_writel(ehci, ehci->command, &ehci->regs->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287
288 /* hardware can take 16 microframes to turn off ... */
Alan Stern9671cd72012-07-11 11:22:16 -0400289 handshake(ehci, &ehci->regs->status, STS_ASS | STS_PSS, 0, 16 * 125);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290}
291
292/*-------------------------------------------------------------------------*/
293
Alan Stern07d29b62007-12-11 16:05:30 -0500294static void end_unlink_async(struct ehci_hcd *ehci);
Alan Stern32830f22012-07-11 11:22:53 -0400295static void unlink_empty_async(struct ehci_hcd *ehci);
David Howells7d12e782006-10-05 14:55:46 +0100296static void ehci_work(struct ehci_hcd *ehci);
Alan Sterndf202252012-07-11 11:22:26 -0400297static void start_unlink_intr(struct ehci_hcd *ehci, struct ehci_qh *qh);
298static void end_unlink_intr(struct ehci_hcd *ehci, struct ehci_qh *qh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299
Alan Sternd58b4bc2012-07-11 11:21:54 -0400300#include "ehci-timer.c"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301#include "ehci-hub.c"
Alek Du48f24972010-06-04 15:47:55 +0800302#include "ehci-lpm.c"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303#include "ehci-mem.c"
304#include "ehci-q.c"
305#include "ehci-sched.c"
Kirill Smelkov4c670452011-07-03 20:36:56 +0400306#include "ehci-sysfs.c"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307
308/*-------------------------------------------------------------------------*/
309
Alan Stern07d29b62007-12-11 16:05:30 -0500310static void ehci_watchdog(unsigned long param)
311{
312 struct ehci_hcd *ehci = (struct ehci_hcd *) param;
313 unsigned long flags;
314
315 spin_lock_irqsave(&ehci->lock, flags);
316
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 /* ehci could run by timer, without IRQs ... */
David Howells7d12e782006-10-05 14:55:46 +0100318 ehci_work (ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319
320 spin_unlock_irqrestore (&ehci->lock, flags);
321}
322
Alan Stern89037952007-02-13 14:55:27 -0500323/* On some systems, leaving remote wakeup enabled prevents system shutdown.
324 * The firmware seems to think that powering off is a wakeup event!
325 * This routine turns off remote wakeup and everything else, on all ports.
326 */
327static void ehci_turn_off_all_ports(struct ehci_hcd *ehci)
328{
329 int port = HCS_N_PORTS(ehci->hcs_params);
330
331 while (port--)
332 ehci_writel(ehci, PORT_RWC_BITS,
333 &ehci->regs->port_status[port]);
334}
335
Sarah Sharp21da84a2008-04-08 14:30:18 -0700336/*
337 * Halt HC, turn off all ports, and let the BIOS use the companion controllers.
338 * Should be called with ehci->lock held.
David Brownell72f30b62005-09-27 10:19:39 -0700339 */
Sarah Sharp21da84a2008-04-08 14:30:18 -0700340static void ehci_silence_controller(struct ehci_hcd *ehci)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341{
Sarah Sharp21da84a2008-04-08 14:30:18 -0700342 ehci_halt(ehci);
Alan Stern89037952007-02-13 14:55:27 -0500343 ehci_turn_off_all_ports(ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
345 /* make BIOS/etc use companion controller during reboot */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100346 ehci_writel(ehci, 0, &ehci->regs->configured_flag);
Alan Stern89037952007-02-13 14:55:27 -0500347
348 /* unblock posted writes */
349 ehci_readl(ehci, &ehci->regs->configured_flag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350}
351
Sarah Sharp21da84a2008-04-08 14:30:18 -0700352/* ehci_shutdown kick in for silicon on any bus (not just pci, etc).
353 * This forcibly disables dma and IRQs, helping kexec and other cases
354 * where the next system software may expect clean state.
355 */
356static void ehci_shutdown(struct usb_hcd *hcd)
357{
358 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
359
360 del_timer_sync(&ehci->watchdog);
Sarah Sharp21da84a2008-04-08 14:30:18 -0700361
362 spin_lock_irq(&ehci->lock);
Alan Sternc0c53db2012-07-11 11:21:48 -0400363 ehci->rh_state = EHCI_RH_STOPPING;
Sarah Sharp21da84a2008-04-08 14:30:18 -0700364 ehci_silence_controller(ehci);
Alan Sternd58b4bc2012-07-11 11:21:54 -0400365 ehci->enabled_hrtimer_events = 0;
Sarah Sharp21da84a2008-04-08 14:30:18 -0700366 spin_unlock_irq(&ehci->lock);
Alan Sternd58b4bc2012-07-11 11:21:54 -0400367
368 hrtimer_cancel(&ehci->hrtimer);
Sarah Sharp21da84a2008-04-08 14:30:18 -0700369}
370
David Brownell56c1e262005-04-09 09:00:29 -0700371static void ehci_port_power (struct ehci_hcd *ehci, int is_on)
372{
373 unsigned port;
374
375 if (!HCS_PPC (ehci->hcs_params))
376 return;
377
378 ehci_dbg (ehci, "...power%s ports...\n", is_on ? "up" : "down");
379 for (port = HCS_N_PORTS (ehci->hcs_params); port > 0; )
380 (void) ehci_hub_control(ehci_to_hcd(ehci),
381 is_on ? SetPortFeature : ClearPortFeature,
382 USB_PORT_FEAT_POWER,
383 port--, NULL, 0);
Alan Stern383975d2007-05-04 11:52:40 -0400384 /* Flush those writes */
385 ehci_readl(ehci, &ehci->regs->command);
David Brownell56c1e262005-04-09 09:00:29 -0700386 msleep(20);
387}
388
Matt Porter7ff71d62005-09-22 22:31:15 -0700389/*-------------------------------------------------------------------------*/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390
Matt Porter7ff71d62005-09-22 22:31:15 -0700391/*
392 * ehci_work is called from some interrupts, timers, and so on.
393 * it calls driver completion functions, after dropping ehci->lock.
394 */
David Howells7d12e782006-10-05 14:55:46 +0100395static void ehci_work (struct ehci_hcd *ehci)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396{
Matt Porter7ff71d62005-09-22 22:31:15 -0700397 timer_action_done (ehci, TIMER_IO_WATCHDOG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398
Matt Porter7ff71d62005-09-22 22:31:15 -0700399 /* another CPU may drop ehci->lock during a schedule scan while
400 * it reports urb completions. this flag guards against bogus
401 * attempts at re-entrant schedule scanning.
402 */
Alan Stern361aabf2012-07-11 11:22:57 -0400403 if (ehci->scanning) {
404 ehci->need_rescan = true;
Matt Porter7ff71d62005-09-22 22:31:15 -0700405 return;
Alan Stern361aabf2012-07-11 11:22:57 -0400406 }
407 ehci->scanning = true;
408
409 rescan:
410 ehci->need_rescan = false;
Alan Stern31446612012-07-11 11:22:21 -0400411 if (ehci->async_count)
412 scan_async(ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700413 if (ehci->next_uframe != -1)
David Howells7d12e782006-10-05 14:55:46 +0100414 scan_periodic (ehci);
Alan Stern361aabf2012-07-11 11:22:57 -0400415 if (ehci->need_rescan)
416 goto rescan;
417 ehci->scanning = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418
Matt Porter7ff71d62005-09-22 22:31:15 -0700419 /* the IO watchdog guards against hardware or driver bugs that
420 * misplace IRQs, and should let us run completely without IRQs.
421 * such lossage has been observed on both VT6202 and VT8235.
422 */
Alan Sterne8799902011-08-18 16:31:30 -0400423 if (ehci->rh_state == EHCI_RH_RUNNING &&
Matt Porter7ff71d62005-09-22 22:31:15 -0700424 (ehci->async->qh_next.ptr != NULL ||
Alan Stern3ca9aeb2012-07-11 11:22:05 -0400425 ehci->periodic_count != 0))
Matt Porter7ff71d62005-09-22 22:31:15 -0700426 timer_action (ehci, TIMER_IO_WATCHDOG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427}
428
Sarah Sharp21da84a2008-04-08 14:30:18 -0700429/*
430 * Called when the ehci_hcd module is removed.
431 */
Matt Porter7ff71d62005-09-22 22:31:15 -0700432static void ehci_stop (struct usb_hcd *hcd)
433{
434 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
435
436 ehci_dbg (ehci, "stop\n");
437
Matt Porter7ff71d62005-09-22 22:31:15 -0700438 /* no more interrupts ... */
439 del_timer_sync (&ehci->watchdog);
440
441 spin_lock_irq(&ehci->lock);
Alan Sternd58b4bc2012-07-11 11:21:54 -0400442 ehci->enabled_hrtimer_events = 0;
Alan Sternc0c53db2012-07-11 11:21:48 -0400443 ehci_quiesce(ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700444
Sarah Sharp21da84a2008-04-08 14:30:18 -0700445 ehci_silence_controller(ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700446 ehci_reset (ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700447 spin_unlock_irq(&ehci->lock);
448
Alan Sternd58b4bc2012-07-11 11:21:54 -0400449 hrtimer_cancel(&ehci->hrtimer);
Kirill Smelkov4c670452011-07-03 20:36:56 +0400450 remove_sysfs_files(ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700451 remove_debug_files (ehci);
452
453 /* root hub is shut down separately (first, when possible) */
454 spin_lock_irq (&ehci->lock);
455 if (ehci->async)
David Howells7d12e782006-10-05 14:55:46 +0100456 ehci_work (ehci);
Alan Stern55934eb2012-07-11 11:22:35 -0400457 end_free_itds(ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700458 spin_unlock_irq (&ehci->lock);
459 ehci_mem_cleanup (ehci);
460
Andiry Xuad935622011-03-01 14:57:05 +0800461 if (ehci->amd_pll_fix == 1)
462 usb_amd_dev_put();
Alex He05570292010-12-07 10:10:08 +0800463
Matt Porter7ff71d62005-09-22 22:31:15 -0700464#ifdef EHCI_STATS
Alan Stern99ac5b12012-07-11 11:21:38 -0400465 ehci_dbg(ehci, "irq normal %ld err %ld iaa %ld (lost %ld)\n",
466 ehci->stats.normal, ehci->stats.error, ehci->stats.iaa,
Matt Porter7ff71d62005-09-22 22:31:15 -0700467 ehci->stats.lost_iaa);
468 ehci_dbg (ehci, "complete %ld unlink %ld\n",
469 ehci->stats.complete, ehci->stats.unlink);
470#endif
471
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100472 dbg_status (ehci, "ehci_stop completed",
473 ehci_readl(ehci, &ehci->regs->status));
Matt Porter7ff71d62005-09-22 22:31:15 -0700474}
475
David Brownell18807522005-11-23 15:45:37 -0800476/* one-time init, only for memory state */
477static int ehci_init(struct usb_hcd *hcd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478{
David Brownell18807522005-11-23 15:45:37 -0800479 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 u32 temp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 int retval;
482 u32 hcc_params;
Alek Du3807e262009-07-14 07:23:29 +0800483 struct ehci_qh_hw *hw;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484
David Brownell18807522005-11-23 15:45:37 -0800485 spin_lock_init(&ehci->lock);
486
Alek Du403dbd32009-07-13 17:30:41 +0800487 /*
488 * keep io watchdog by default, those good HCDs could turn off it later
489 */
490 ehci->need_io_watchdog = 1;
David Brownell18807522005-11-23 15:45:37 -0800491 init_timer(&ehci->watchdog);
492 ehci->watchdog.function = ehci_watchdog;
493 ehci->watchdog.data = (unsigned long) ehci;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494
Alan Sternd58b4bc2012-07-11 11:21:54 -0400495 hrtimer_init(&ehci->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
496 ehci->hrtimer.function = ehci_hrtimer_func;
497 ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT;
498
Alan Sternf75593c2011-01-06 10:17:09 -0500499 hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params);
500
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 /*
Kirill Smelkovcc62a7e2011-07-03 20:36:57 +0400502 * by default set standard 80% (== 100 usec/uframe) max periodic
503 * bandwidth as required by USB 2.0
504 */
505 ehci->uframe_periodic_max = 100;
506
507 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 * hw default: 1K periodic list heads, one per frame.
509 * periodic_size can shrink by USBCMD update if hcc_params allows.
510 */
511 ehci->periodic_size = DEFAULT_I_TDPS;
Karsten Wiese9aa09d22009-02-08 16:07:58 -0800512 INIT_LIST_HEAD(&ehci->cached_itd_list);
Alan Stern0e5f2312010-04-08 16:56:37 -0400513 INIT_LIST_HEAD(&ehci->cached_sitd_list);
Alan Sternf75593c2011-01-06 10:17:09 -0500514
Greg Kroah-Hartman8e192912012-05-21 08:54:43 -0700515 if (HCC_PGM_FRAMELISTLEN(hcc_params)) {
Alan Sternf75593c2011-01-06 10:17:09 -0500516 /* periodic schedule size can be smaller than default */
517 switch (EHCI_TUNE_FLS) {
518 case 0: ehci->periodic_size = 1024; break;
519 case 1: ehci->periodic_size = 512; break;
520 case 2: ehci->periodic_size = 256; break;
521 default: BUG();
522 }
523 }
David Brownell18807522005-11-23 15:45:37 -0800524 if ((retval = ehci_mem_init(ehci, GFP_KERNEL)) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 return retval;
526
527 /* controllers may cache some of the periodic schedule ... */
David Brownell53bd6a62006-08-30 14:50:06 -0700528 if (HCC_ISOC_CACHE(hcc_params)) // full frame cache
Sarah Sharpdccd5742009-10-27 10:55:05 -0700529 ehci->i_thresh = 2 + 8;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530 else // N microframes cached
David Brownell18807522005-11-23 15:45:37 -0800531 ehci->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 ehci->next_uframe = -1;
Karsten Wiese9aa09d22009-02-08 16:07:58 -0800534 ehci->clock_frame = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 /*
537 * dedicate a qh for the async ring head, since we couldn't unlink
538 * a 'real' qh without stopping the async schedule [4.8]. use it
539 * as the 'reclamation list head' too.
540 * its dummy is used in hw_alt_next of many tds, to prevent the qh
541 * from automatically advancing to the next td after short reads.
542 */
David Brownell18807522005-11-23 15:45:37 -0800543 ehci->async->qh_next.qh = NULL;
Alek Du3807e262009-07-14 07:23:29 +0800544 hw = ehci->async->hw;
545 hw->hw_next = QH_NEXT(ehci, ehci->async->qh_dma);
546 hw->hw_info1 = cpu_to_hc32(ehci, QH_HEAD);
Ricardo Martins4f7a67e2012-05-22 18:02:03 +0100547#if defined(CONFIG_PPC_PS3)
Alan Stern4c53de72012-07-11 11:21:32 -0400548 hw->hw_info1 |= cpu_to_hc32(ehci, QH_INACTIVATE);
Ricardo Martins4f7a67e2012-05-22 18:02:03 +0100549#endif
Alek Du3807e262009-07-14 07:23:29 +0800550 hw->hw_token = cpu_to_hc32(ehci, QTD_STS_HALT);
551 hw->hw_qtd_next = EHCI_LIST_END(ehci);
David Brownell18807522005-11-23 15:45:37 -0800552 ehci->async->qh_state = QH_STATE_LINKED;
Alek Du3807e262009-07-14 07:23:29 +0800553 hw->hw_alt_next = QTD_NEXT(ehci, ehci->async->dummy->qtd_dma);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554
555 /* clear interrupt enables, set irq latency */
556 if (log2_irq_thresh < 0 || log2_irq_thresh > 6)
557 log2_irq_thresh = 0;
558 temp = 1 << (16 + log2_irq_thresh);
Alek Du5a9cdf32010-06-04 15:47:56 +0800559 if (HCC_PER_PORT_CHANGE_EVENT(hcc_params)) {
560 ehci->has_ppcd = 1;
561 ehci_dbg(ehci, "enable per-port change event\n");
562 temp |= CMD_PPCEE;
563 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 if (HCC_CANPARK(hcc_params)) {
565 /* HW default park == 3, on hardware that supports it (like
566 * NVidia and ALI silicon), maximizes throughput on the async
567 * schedule by avoiding QH fetches between transfers.
568 *
569 * With fast usb storage devices and NForce2, "park" seems to
570 * make problems: throughput reduction (!), data errors...
571 */
572 if (park) {
David Brownell18807522005-11-23 15:45:37 -0800573 park = min(park, (unsigned) 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 temp |= CMD_PARK;
575 temp |= park << 8;
576 }
David Brownell18807522005-11-23 15:45:37 -0800577 ehci_dbg(ehci, "park %d\n", park);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 }
David Brownell18807522005-11-23 15:45:37 -0800579 if (HCC_PGM_FRAMELISTLEN(hcc_params)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 /* periodic schedule size can be smaller than default */
581 temp &= ~(3 << 2);
582 temp |= (EHCI_TUNE_FLS << 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 }
Alek Du48f24972010-06-04 15:47:55 +0800584 if (HCC_LPM(hcc_params)) {
585 /* support link power management EHCI 1.1 addendum */
586 ehci_dbg(ehci, "support lpm\n");
587 ehci->has_lpm = 1;
588 if (hird > 0xf) {
589 ehci_dbg(ehci, "hird %d invalid, use default 0",
590 hird);
591 hird = 0;
592 }
593 temp |= hird << 24;
594 }
David Brownell18807522005-11-23 15:45:37 -0800595 ehci->command = temp;
596
Alan Stern40f8db82009-11-06 12:29:40 -0500597 /* Accept arbitrarily long scatter-gather lists */
Andrea Righi4307a282010-06-28 16:56:45 +0200598 if (!(hcd->driver->flags & HCD_LOCAL_MEM))
599 hcd->self.sg_tablesize = ~0;
David Brownell18807522005-11-23 15:45:37 -0800600 return 0;
601}
602
603/* start HC running; it's halted, ehci_init() has been run (once) */
604static int ehci_run (struct usb_hcd *hcd)
605{
606 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
David Brownell18807522005-11-23 15:45:37 -0800607 u32 temp;
608 u32 hcc_params;
609
Marcelo Tosatti1d619f12007-01-21 19:45:59 -0200610 hcd->uses_new_polling = 1;
Marcelo Tosatti1d619f12007-01-21 19:45:59 -0200611
David Brownell18807522005-11-23 15:45:37 -0800612 /* EHCI spec section 4.1 */
Geoff Levand876e0df2011-11-22 18:04:45 -0800613
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100614 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
615 ehci_writel(ehci, (u32)ehci->async->qh_dma, &ehci->regs->async_next);
David Brownell18807522005-11-23 15:45:37 -0800616
617 /*
618 * hcc_params controls whether ehci->regs->segment must (!!!)
619 * be used; it constrains QH/ITD/SITD and QTD locations.
620 * pci_pool consistent memory always uses segment zero.
621 * streaming mappings for I/O buffers, like pci_map_single(),
622 * can return segments above 4GB, if the device allows.
623 *
624 * NOTE: the dma mask is visible through dma_supported(), so
625 * drivers can pass this info along ... like NETIF_F_HIGHDMA,
626 * Scsi_Host.highmem_io, and so forth. It's readonly to all
627 * host side drivers though.
628 */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100629 hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params);
David Brownell18807522005-11-23 15:45:37 -0800630 if (HCC_64BIT_ADDR(hcc_params)) {
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100631 ehci_writel(ehci, 0, &ehci->regs->segment);
David Brownell18807522005-11-23 15:45:37 -0800632#if 0
633// this is deeply broken on almost all architectures
Yang Hongyang6a355282009-04-06 19:01:13 -0700634 if (!dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64)))
David Brownell18807522005-11-23 15:45:37 -0800635 ehci_info(ehci, "enabled 64bit DMA\n");
636#endif
637 }
638
639
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 // Philips, Intel, and maybe others need CMD_RUN before the
641 // root hub will detect new devices (why?); NEC doesn't
David Brownell18807522005-11-23 15:45:37 -0800642 ehci->command &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET);
643 ehci->command |= CMD_RUN;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100644 ehci_writel(ehci, ehci->command, &ehci->regs->command);
David Brownell18807522005-11-23 15:45:37 -0800645 dbg_cmd (ehci, "init", ehci->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 /*
648 * Start, enabling full USB 2.0 functionality ... usb 1.1 devices
649 * are explicitly handed to companion controller(s), so no TT is
650 * involved with the root hub. (Except where one is integrated,
651 * and there's no companion controller unless maybe for USB OTG.)
Alan Stern32fe0192007-10-10 16:27:07 -0400652 *
653 * Turning on the CF flag will transfer ownership of all ports
654 * from the companions to the EHCI controller. If any of the
655 * companions are in the middle of a port reset at the time, it
656 * could cause trouble. Write-locking ehci_cf_port_reset_rwsem
David Brownell1cb52652007-11-13 16:22:30 -0800657 * guarantees that no resets are in progress. After we set CF,
658 * a short delay lets the hardware catch up; new resets shouldn't
659 * be started before the port switching actions could complete.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 */
Alan Stern32fe0192007-10-10 16:27:07 -0400661 down_write(&ehci_cf_port_reset_rwsem);
Alan Sterne8799902011-08-18 16:31:30 -0400662 ehci->rh_state = EHCI_RH_RUNNING;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100663 ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
664 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
David Brownell1cb52652007-11-13 16:22:30 -0800665 msleep(5);
Alan Stern32fe0192007-10-10 16:27:07 -0400666 up_write(&ehci_cf_port_reset_rwsem);
Oliver Neukumee4ecb82009-11-27 15:17:59 +0100667 ehci->last_periodic_enable = ktime_get_real();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668
Jan Anderssonc4301312011-05-03 20:11:57 +0200669 temp = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 ehci_info (ehci,
Alan Stern2b70f072008-10-02 11:47:15 -0400671 "USB %x.%x started, EHCI %x.%02x%s\n",
Matt Porter7ff71d62005-09-22 22:31:15 -0700672 ((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f),
Alan Stern2b70f072008-10-02 11:47:15 -0400673 temp >> 8, temp & 0xff,
David Brownell93f1a472006-11-16 23:34:58 -0800674 ignore_oc ? ", overcurrent ignored" : "");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100676 ehci_writel(ehci, INTR_MASK,
677 &ehci->regs->intr_enable); /* Turn On Interrupts */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678
David Brownell18807522005-11-23 15:45:37 -0800679 /* GRR this is run-once init(), being done every time the HC starts.
680 * So long as they're part of class devices, we can't do it init()
681 * since the class device isn't created that early.
682 */
683 create_debug_files(ehci);
Kirill Smelkov4c670452011-07-03 20:36:56 +0400684 create_sysfs_files(ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685
686 return 0;
687}
688
Alan Stern1a49e2a2012-07-09 15:55:14 -0400689static int ehci_setup(struct usb_hcd *hcd)
Matthieu CASTET2093c6b2011-07-02 19:47:33 +0200690{
691 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
692 int retval;
693
694 ehci->regs = (void __iomem *)ehci->caps +
695 HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
696 dbg_hcs_params(ehci, "reset");
697 dbg_hcc_params(ehci, "reset");
698
699 /* cache this readonly data; minimize chip reads */
700 ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
701
702 ehci->sbrn = HCD_USB2;
703
Alan Stern631fe9d2012-07-11 11:21:09 -0400704 /* data structure init */
705 retval = ehci_init(hcd);
Matthieu CASTET2093c6b2011-07-02 19:47:33 +0200706 if (retval)
707 return retval;
708
Alan Stern631fe9d2012-07-11 11:21:09 -0400709 retval = ehci_halt(ehci);
Matthieu CASTET2093c6b2011-07-02 19:47:33 +0200710 if (retval)
711 return retval;
712
Alan Stern1a49e2a2012-07-09 15:55:14 -0400713 if (ehci_is_TDI(ehci))
714 tdi_reset(ehci);
715
Matthieu CASTET2093c6b2011-07-02 19:47:33 +0200716 ehci_reset(ehci);
717
718 return 0;
719}
720
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721/*-------------------------------------------------------------------------*/
722
David Howells7d12e782006-10-05 14:55:46 +0100723static irqreturn_t ehci_irq (struct usb_hcd *hcd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724{
725 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
Alan Stern67b2e022008-11-12 17:04:53 -0500726 u32 status, masked_status, pcd_status = 0, cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 int bh;
728
729 spin_lock (&ehci->lock);
730
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100731 status = ehci_readl(ehci, &ehci->regs->status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732
733 /* e.g. cardbus physical eject */
734 if (status == ~(u32) 0) {
735 ehci_dbg (ehci, "device removed\n");
736 goto dead;
737 }
738
Alan Stern2fbe2bf2012-04-18 11:33:00 -0400739 /*
740 * We don't use STS_FLR, but some controllers don't like it to
741 * remain on, so mask it out along with the other status bits.
742 */
743 masked_status = status & (INTR_MASK | STS_FLR);
744
Alan Stern69fff592011-05-17 17:27:12 -0400745 /* Shared IRQ? */
Alan Sterne8799902011-08-18 16:31:30 -0400746 if (!masked_status || unlikely(ehci->rh_state == EHCI_RH_HALTED)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747 spin_unlock(&ehci->lock);
748 return IRQ_NONE;
749 }
750
751 /* clear (just) interrupts */
Alan Stern67b2e022008-11-12 17:04:53 -0500752 ehci_writel(ehci, masked_status, &ehci->regs->status);
David Brownelle82cc122008-03-07 13:49:42 -0800753 cmd = ehci_readl(ehci, &ehci->regs->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 bh = 0;
755
David Brownell9776afc2008-02-01 11:42:05 -0800756#ifdef VERBOSE_DEBUG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 /* unrequested/ignored: Frame List Rollover */
758 dbg_status (ehci, "irq", status);
759#endif
760
761 /* INT, ERR, and IAA interrupt rates can be throttled */
762
763 /* normal [4.15.1.2] or error [4.15.1.1] completion */
764 if (likely ((status & (STS_INT|STS_ERR)) != 0)) {
765 if (likely ((status & STS_ERR) == 0))
766 COUNT (ehci->stats.normal);
767 else
768 COUNT (ehci->stats.error);
769 bh = 1;
770 }
771
772 /* complete the unlinking of some qh [4.15.2.3] */
773 if (status & STS_IAA) {
Alan Stern9d938742012-07-11 11:22:44 -0400774
775 /* Turn off the IAA watchdog */
776 ehci->enabled_hrtimer_events &= ~BIT(EHCI_HRTIMER_IAA_WATCHDOG);
777
778 /*
779 * Mild optimization: Allow another IAAD to reset the
780 * hrtimer, if one occurs before the next expiration.
781 * In theory we could always cancel the hrtimer, but
782 * tests show that about half the time it will be reset
783 * for some other event anyway.
784 */
785 if (ehci->next_hrtimer_event == EHCI_HRTIMER_IAA_WATCHDOG)
786 ++ehci->next_hrtimer_event;
787
David Brownelle82cc122008-03-07 13:49:42 -0800788 /* guard against (alleged) silicon errata */
Alan Stern6feff1b2012-04-17 15:23:25 -0400789 if (cmd & CMD_IAAD)
David Brownelle82cc122008-03-07 13:49:42 -0800790 ehci_dbg(ehci, "IAA with IAAD still set?\n");
Alan Stern3c273a02012-07-11 11:22:49 -0400791 if (ehci->async_iaa) {
Alan Stern99ac5b12012-07-11 11:21:38 -0400792 COUNT(ehci->stats.iaa);
David Brownelle82cc122008-03-07 13:49:42 -0800793 end_unlink_async(ehci);
794 } else
Alan Stern99ac5b12012-07-11 11:21:38 -0400795 ehci_dbg(ehci, "IAA with nothing unlinked?\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796 }
797
798 /* remote wakeup [4.3.1] */
David Brownelld97cc2f2005-12-22 17:05:18 -0800799 if (status & STS_PCD) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800 unsigned i = HCS_N_PORTS (ehci->hcs_params);
Alek Du5a9cdf32010-06-04 15:47:56 +0800801 u32 ppcd = 0;
David Brownelld1b18422008-03-05 23:37:52 -0800802
803 /* kick root hub later */
Marcelo Tosatti1d619f12007-01-21 19:45:59 -0200804 pcd_status = status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805
806 /* resume root hub? */
Alan Sterndc75ce92012-04-17 15:24:15 -0400807 if (ehci->rh_state == EHCI_RH_SUSPENDED)
Alan Stern8c033562006-11-09 14:42:16 -0500808 usb_hcd_resume_root_hub(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809
Alek Du5a9cdf32010-06-04 15:47:56 +0800810 /* get per-port change detect bits */
811 if (ehci->has_ppcd)
812 ppcd = status >> 16;
813
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 while (i--) {
Alek Du5a9cdf32010-06-04 15:47:56 +0800815 int pstatus;
816
817 /* leverage per-port change bits feature */
818 if (ehci->has_ppcd && !(ppcd & (1 << i)))
819 continue;
820 pstatus = ehci_readl(ehci,
821 &ehci->regs->port_status[i]);
David Brownellb972b682006-06-30 02:34:42 -0700822
823 if (pstatus & PORT_OWNER)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 continue;
Alan Sterneafe5b92008-10-06 11:25:53 -0400825 if (!(test_bit(i, &ehci->suspended_ports) &&
826 ((pstatus & PORT_RESUME) ||
827 !(pstatus & PORT_SUSPEND)) &&
828 (pstatus & PORT_PE) &&
829 ehci->reset_done[i] == 0))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830 continue;
831
832 /* start 20 msec resume signaling from this port,
833 * and make khubd collect PORT_STAT_C_SUSPEND to
Alan Stern49d0f072010-01-08 11:18:38 -0500834 * stop that signaling. Use 5 ms extra for safety,
835 * like usb_port_resume() does.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836 */
Alan Stern49d0f072010-01-08 11:18:38 -0500837 ehci->reset_done[i] = jiffies + msecs_to_jiffies(25);
Alan Sterna448e4d2012-04-03 15:24:30 -0400838 set_bit(i, &ehci->resuming_ports);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 ehci_dbg (ehci, "port %d remote wakeup\n", i + 1);
Alan Stern61e8b852007-04-09 11:52:31 -0400840 mod_timer(&hcd->rh_timer, ehci->reset_done[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 }
842 }
843
844 /* PCI errors [4.15.2.4] */
845 if (unlikely ((status & STS_FATAL) != 0)) {
Alan Stern67b2e022008-11-12 17:04:53 -0500846 ehci_err(ehci, "fatal error\n");
Alan Sterneafe5b92008-10-06 11:25:53 -0400847 dbg_cmd(ehci, "fatal", cmd);
848 dbg_status(ehci, "fatal", status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849dead:
Alan Stern69fff592011-05-17 17:27:12 -0400850 usb_hc_died(hcd);
Alan Sternbf6387b2012-07-11 11:22:31 -0400851
852 /* Don't let the controller do anything more */
853 ehci->rh_state = EHCI_RH_STOPPING;
854 ehci->command &= ~(CMD_RUN | CMD_ASE | CMD_PSE);
855 ehci_writel(ehci, ehci->command, &ehci->regs->command);
856 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
857 ehci_handle_controller_death(ehci);
858
859 /* Handle completions when the controller stops */
860 bh = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 }
862
863 if (bh)
David Howells7d12e782006-10-05 14:55:46 +0100864 ehci_work (ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865 spin_unlock (&ehci->lock);
David Brownelld1b18422008-03-05 23:37:52 -0800866 if (pcd_status)
Marcelo Tosatti1d619f12007-01-21 19:45:59 -0200867 usb_hcd_poll_rh_status(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868 return IRQ_HANDLED;
869}
870
871/*-------------------------------------------------------------------------*/
872
873/*
874 * non-error returns are a promise to giveback() the urb later
875 * we drop ownership so next owner (or urb unlink) can get it
876 *
877 * urb + dev is in hcd.self.controller.urb_list
878 * we're queueing TDs onto software and hardware lists
879 *
880 * hcd-specific init for hcpriv hasn't been done yet
881 *
882 * NOTE: control, bulk, and interrupt share the same code to append TDs
883 * to a (possibly active) QH, and the same QH scanning code.
884 */
885static int ehci_urb_enqueue (
886 struct usb_hcd *hcd,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887 struct urb *urb,
Al Viro55016f12005-10-21 03:21:58 -0400888 gfp_t mem_flags
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889) {
890 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
891 struct list_head qtd_list;
892
893 INIT_LIST_HEAD (&qtd_list);
894
895 switch (usb_pipetype (urb->pipe)) {
David Brownell25b70a82008-03-04 15:11:07 -0800896 case PIPE_CONTROL:
897 /* qh_completions() code doesn't handle all the fault cases
898 * in multi-TD control transfers. Even 1KB is rare anyway.
899 */
900 if (urb->transfer_buffer_length > (16 * 1024))
901 return -EMSGSIZE;
902 /* FALLTHROUGH */
903 /* case PIPE_BULK: */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904 default:
905 if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags))
906 return -ENOMEM;
Alan Sterne9df41c2007-08-08 11:48:02 -0400907 return submit_async(ehci, urb, &qtd_list, mem_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908
909 case PIPE_INTERRUPT:
910 if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags))
911 return -ENOMEM;
Alan Sterne9df41c2007-08-08 11:48:02 -0400912 return intr_submit(ehci, urb, &qtd_list, mem_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913
914 case PIPE_ISOCHRONOUS:
915 if (urb->dev->speed == USB_SPEED_HIGH)
916 return itd_submit (ehci, urb, mem_flags);
917 else
918 return sitd_submit (ehci, urb, mem_flags);
919 }
920}
921
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922/* remove from hardware lists
923 * completions normally happen asynchronously
924 */
925
Alan Sterne9df41c2007-08-08 11:48:02 -0400926static int ehci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927{
928 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
929 struct ehci_qh *qh;
930 unsigned long flags;
Alan Sterne9df41c2007-08-08 11:48:02 -0400931 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932
933 spin_lock_irqsave (&ehci->lock, flags);
Alan Sterne9df41c2007-08-08 11:48:02 -0400934 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
935 if (rc)
936 goto done;
937
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 switch (usb_pipetype (urb->pipe)) {
939 // case PIPE_CONTROL:
940 // case PIPE_BULK:
941 default:
942 qh = (struct ehci_qh *) urb->hcpriv;
943 if (!qh)
944 break;
Alan Stern07d29b62007-12-11 16:05:30 -0500945 switch (qh->qh_state) {
946 case QH_STATE_LINKED:
947 case QH_STATE_COMPLETING:
Alan Stern3c273a02012-07-11 11:22:49 -0400948 start_unlink_async(ehci, qh);
Alan Stern07d29b62007-12-11 16:05:30 -0500949 break;
950 case QH_STATE_UNLINK:
951 case QH_STATE_UNLINK_WAIT:
952 /* already started */
953 break;
954 case QH_STATE_IDLE:
Alan Stern7a0f0d92009-07-31 10:40:22 -0400955 /* QH might be waiting for a Clear-TT-Buffer */
956 qh_completions(ehci, qh);
Alan Stern07d29b62007-12-11 16:05:30 -0500957 break;
958 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959 break;
960
961 case PIPE_INTERRUPT:
962 qh = (struct ehci_qh *) urb->hcpriv;
963 if (!qh)
964 break;
965 switch (qh->qh_state) {
966 case QH_STATE_LINKED:
Alan Sterna448c9d2009-08-19 12:22:44 -0400967 case QH_STATE_COMPLETING:
Alan Sterndf202252012-07-11 11:22:26 -0400968 start_unlink_intr(ehci, qh);
Alan Sterna448c9d2009-08-19 12:22:44 -0400969 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970 case QH_STATE_IDLE:
David Howells7d12e782006-10-05 14:55:46 +0100971 qh_completions (ehci, qh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972 break;
973 default:
974 ehci_dbg (ehci, "bogus qh %p state %d\n",
975 qh, qh->qh_state);
976 goto done;
977 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978 break;
979
980 case PIPE_ISOCHRONOUS:
981 // itd or sitd ...
982
983 // wait till next completion, do it then.
984 // completion irqs can wait up to 1024 msec,
985 break;
986 }
987done:
988 spin_unlock_irqrestore (&ehci->lock, flags);
Alan Sterne9df41c2007-08-08 11:48:02 -0400989 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990}
991
992/*-------------------------------------------------------------------------*/
993
994// bulk qh holds the data toggle
995
996static void
997ehci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep)
998{
999 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
1000 unsigned long flags;
1001 struct ehci_qh *qh, *tmp;
1002
1003 /* ASSERT: any requests/urbs are being unlinked */
1004 /* ASSERT: nobody can be submitting urbs for this any more */
1005
1006rescan:
1007 spin_lock_irqsave (&ehci->lock, flags);
1008 qh = ep->hcpriv;
1009 if (!qh)
1010 goto done;
1011
1012 /* endpoints can be iso streams. for now, we don't
1013 * accelerate iso completions ... so spin a while.
1014 */
Clemens Ladisch1082f572010-03-01 17:18:56 +01001015 if (qh->hw == NULL) {
Alan Stern8c5bf7b2012-07-11 11:22:39 -04001016 struct ehci_iso_stream *stream = ep->hcpriv;
1017
1018 if (!list_empty(&stream->td_list))
1019 goto idle_timeout;
1020
1021 /* BUG_ON(!list_empty(&stream->free_list)); */
1022 kfree(stream);
1023 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024 }
1025
Alan Sternc0c53db2012-07-11 11:21:48 -04001026 if (ehci->rh_state < EHCI_RH_RUNNING)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027 qh->qh_state = QH_STATE_IDLE;
1028 switch (qh->qh_state) {
1029 case QH_STATE_LINKED:
Alan Stern3a444942009-08-19 12:22:06 -04001030 case QH_STATE_COMPLETING:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031 for (tmp = ehci->async->qh_next.qh;
1032 tmp && tmp != qh;
1033 tmp = tmp->qh_next.qh)
1034 continue;
Alan Stern02e2c512010-11-16 10:57:37 -05001035 /* periodic qh self-unlinks on empty, and a COMPLETING qh
1036 * may already be unlinked.
1037 */
1038 if (tmp)
Alan Stern3c273a02012-07-11 11:22:49 -04001039 start_unlink_async(ehci, qh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 /* FALL THROUGH */
1041 case QH_STATE_UNLINK: /* wait for hw to finish? */
Alan Stern07d29b62007-12-11 16:05:30 -05001042 case QH_STATE_UNLINK_WAIT:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043idle_timeout:
1044 spin_unlock_irqrestore (&ehci->lock, flags);
Nishanth Aravamudan22c43862005-08-15 11:30:11 -07001045 schedule_timeout_uninterruptible(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046 goto rescan;
1047 case QH_STATE_IDLE: /* fully unlinked */
Alan Stern914b7012009-06-29 10:47:30 -04001048 if (qh->clearing_tt)
1049 goto idle_timeout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050 if (list_empty (&qh->qtd_list)) {
Alan Sternc83e1a92012-07-11 11:21:25 -04001051 qh_destroy(ehci, qh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052 break;
1053 }
1054 /* else FALL THROUGH */
1055 default:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056 /* caller was supposed to have unlinked any requests;
1057 * that's not our job. just leak this memory.
1058 */
1059 ehci_err (ehci, "qh %p (#%02x) state %d%s\n",
1060 qh, ep->desc.bEndpointAddress, qh->qh_state,
1061 list_empty (&qh->qtd_list) ? "" : "(has tds)");
1062 break;
1063 }
Alan Stern8c5bf7b2012-07-11 11:22:39 -04001064 done:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065 ep->hcpriv = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066 spin_unlock_irqrestore (&ehci->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067}
1068
Alan Sternb18ffd42009-05-27 18:21:56 -04001069static void
1070ehci_endpoint_reset(struct usb_hcd *hcd, struct usb_host_endpoint *ep)
1071{
1072 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1073 struct ehci_qh *qh;
1074 int eptype = usb_endpoint_type(&ep->desc);
Alan Sterna455212d2009-06-11 14:56:22 -04001075 int epnum = usb_endpoint_num(&ep->desc);
1076 int is_out = usb_endpoint_dir_out(&ep->desc);
1077 unsigned long flags;
Alan Sternb18ffd42009-05-27 18:21:56 -04001078
1079 if (eptype != USB_ENDPOINT_XFER_BULK && eptype != USB_ENDPOINT_XFER_INT)
1080 return;
1081
Alan Sterna455212d2009-06-11 14:56:22 -04001082 spin_lock_irqsave(&ehci->lock, flags);
Alan Sternb18ffd42009-05-27 18:21:56 -04001083 qh = ep->hcpriv;
1084
1085 /* For Bulk and Interrupt endpoints we maintain the toggle state
1086 * in the hardware; the toggle bits in udev aren't used at all.
1087 * When an endpoint is reset by usb_clear_halt() we must reset
1088 * the toggle bit in the QH.
1089 */
1090 if (qh) {
Alan Sterna455212d2009-06-11 14:56:22 -04001091 usb_settoggle(qh->dev, epnum, is_out, 0);
Alan Sternb18ffd42009-05-27 18:21:56 -04001092 if (!list_empty(&qh->qtd_list)) {
1093 WARN_ONCE(1, "clear_halt for a busy endpoint\n");
Alan Stern3a444942009-08-19 12:22:06 -04001094 } else if (qh->qh_state == QH_STATE_LINKED ||
1095 qh->qh_state == QH_STATE_COMPLETING) {
Alan Sterna455212d2009-06-11 14:56:22 -04001096
1097 /* The toggle value in the QH can't be updated
1098 * while the QH is active. Unlink it now;
1099 * re-linking will call qh_refresh().
Alan Sternb18ffd42009-05-27 18:21:56 -04001100 */
Alan Sterna448c9d2009-08-19 12:22:44 -04001101 if (eptype == USB_ENDPOINT_XFER_BULK)
Alan Stern3c273a02012-07-11 11:22:49 -04001102 start_unlink_async(ehci, qh);
Alan Sterna448c9d2009-08-19 12:22:44 -04001103 else
Alan Sterndf202252012-07-11 11:22:26 -04001104 start_unlink_intr(ehci, qh);
Alan Sternb18ffd42009-05-27 18:21:56 -04001105 }
1106 }
Alan Sterna455212d2009-06-11 14:56:22 -04001107 spin_unlock_irqrestore(&ehci->lock, flags);
Alan Sternb18ffd42009-05-27 18:21:56 -04001108}
1109
Matt Porter7ff71d62005-09-22 22:31:15 -07001110static int ehci_get_frame (struct usb_hcd *hcd)
1111{
1112 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
Alan Stern68aa95d2011-10-12 10:39:14 -04001113 return (ehci_read_frame_index(ehci) >> 3) % ehci->periodic_size;
Matt Porter7ff71d62005-09-22 22:31:15 -07001114}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115
1116/*-------------------------------------------------------------------------*/
Alan Sternc5cf9212012-06-28 11:19:02 -04001117
1118#ifdef CONFIG_PM
1119
1120/* suspend/resume, section 4.3 */
1121
1122/* These routines handle the generic parts of controller suspend/resume */
1123
1124static int __maybe_unused ehci_suspend(struct usb_hcd *hcd, bool do_wakeup)
1125{
1126 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1127
1128 if (time_before(jiffies, ehci->next_statechange))
1129 msleep(10);
1130
1131 /*
1132 * Root hub was already suspended. Disable IRQ emission and
1133 * mark HW unaccessible. The PM and USB cores make sure that
1134 * the root hub is either suspended or stopped.
1135 */
1136 ehci_prepare_ports_for_controller_suspend(ehci, do_wakeup);
1137
1138 spin_lock_irq(&ehci->lock);
1139 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
1140 (void) ehci_readl(ehci, &ehci->regs->intr_enable);
1141
1142 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
1143 spin_unlock_irq(&ehci->lock);
1144
1145 return 0;
1146}
1147
1148/* Returns 0 if power was preserved, 1 if power was lost */
1149static int __maybe_unused ehci_resume(struct usb_hcd *hcd, bool hibernated)
1150{
1151 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1152
1153 if (time_before(jiffies, ehci->next_statechange))
1154 msleep(100);
1155
1156 /* Mark hardware accessible again as we are back to full power by now */
1157 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
1158
1159 /*
1160 * If CF is still set and we aren't resuming from hibernation
1161 * then we maintained suspend power.
1162 * Just undo the effect of ehci_suspend().
1163 */
1164 if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF &&
1165 !hibernated) {
1166 int mask = INTR_MASK;
1167
1168 ehci_prepare_ports_for_controller_resume(ehci);
1169 if (!hcd->self.root_hub->do_remote_wakeup)
1170 mask &= ~STS_PCD;
1171 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
1172 ehci_readl(ehci, &ehci->regs->intr_enable);
1173 return 0;
1174 }
1175
1176 /*
1177 * Else reset, to cope with power loss or resume from hibernation
1178 * having let the firmware kick in during reboot.
1179 */
1180 usb_root_hub_lost_power(hcd->self.root_hub);
1181 (void) ehci_halt(ehci);
1182 (void) ehci_reset(ehci);
1183
Alan Sternc5cf9212012-06-28 11:19:02 -04001184 ehci_writel(ehci, ehci->command, &ehci->regs->command);
1185 ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
1186 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
1187
1188 /* here we "know" root ports should always stay powered */
1189 ehci_port_power(ehci, 1);
1190
1191 ehci->rh_state = EHCI_RH_SUSPENDED;
1192 return 1;
1193}
1194
1195#endif
1196
1197/*-------------------------------------------------------------------------*/
1198
Alexander Shishkineb70e5a2012-05-11 17:25:54 +03001199/*
1200 * The EHCI in ChipIdea HDRC cannot be a separate module or device,
1201 * because its registers (and irq) are shared between host/gadget/otg
1202 * functions and in order to facilitate role switching we cannot
1203 * give the ehci driver exclusive access to those.
1204 */
1205#ifndef CHIPIDEA_EHCI
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206
Alan Stern2b70f072008-10-02 11:47:15 -04001207MODULE_DESCRIPTION(DRIVER_DESC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208MODULE_AUTHOR (DRIVER_AUTHOR);
1209MODULE_LICENSE ("GPL");
1210
Matt Porter7ff71d62005-09-22 22:31:15 -07001211#ifdef CONFIG_PCI
1212#include "ehci-pci.c"
Kumar Gala01cced22006-04-11 10:07:16 -05001213#define PCI_DRIVER ehci_pci_driver
Matt Porter7ff71d62005-09-22 22:31:15 -07001214#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215
Li Yangba029782007-05-11 17:09:55 +08001216#ifdef CONFIG_USB_EHCI_FSL
Randy Vinson80cb9ae2006-01-20 13:53:38 -08001217#include "ehci-fsl.c"
Kumar Gala01cced22006-04-11 10:07:16 -05001218#define PLATFORM_DRIVER ehci_fsl_driver
Randy Vinson80cb9ae2006-01-20 13:53:38 -08001219#endif
1220
Daniel Mack7e8d5cd2009-10-28 01:14:59 +01001221#ifdef CONFIG_USB_EHCI_MXC
1222#include "ehci-mxc.c"
1223#define PLATFORM_DRIVER ehci_mxc_driver
1224#endif
1225
Yoshihiro Shimoda60b0bf02011-03-01 16:58:37 +09001226#ifdef CONFIG_USB_EHCI_SH
Paul Mundt63c84552010-11-01 17:03:27 -04001227#include "ehci-sh.c"
1228#define PLATFORM_DRIVER ehci_hcd_sh_driver
1229#endif
1230
Manuel Lauss3766386032011-08-12 11:39:45 +02001231#ifdef CONFIG_MIPS_ALCHEMY
Jordan Crouse76fa9a22006-01-20 14:06:09 -08001232#include "ehci-au1xxx.c"
Kumar Gala01cced22006-04-11 10:07:16 -05001233#define PLATFORM_DRIVER ehci_hcd_au1xxx_driver
Jordan Crouse76fa9a22006-01-20 14:06:09 -08001234#endif
1235
Keshava Munegowda7f124f42010-11-21 23:23:41 +05301236#ifdef CONFIG_USB_EHCI_HCD_OMAP
Felipe Balbi54ab2b02009-10-14 11:44:14 +03001237#include "ehci-omap.c"
1238#define PLATFORM_DRIVER ehci_hcd_omap_driver
1239#endif
1240
Geoff Levandad75a412007-01-15 20:11:47 -08001241#ifdef CONFIG_PPC_PS3
1242#include "ehci-ps3.c"
Geoff Levand7a4eb7f2007-06-05 20:04:35 -07001243#define PS3_SYSTEM_BUS_DRIVER ps3_ehci_driver
Geoff Levandad75a412007-01-15 20:11:47 -08001244#endif
1245
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001246#ifdef CONFIG_USB_EHCI_HCD_PPC_OF
1247#include "ehci-ppc-of.c"
1248#define OF_PLATFORM_DRIVER ehci_hcd_ppc_of_driver
1249#endif
1250
Julie Zhu08d3c182009-09-21 16:08:19 -06001251#ifdef CONFIG_XPS_USB_HCD_XILINX
1252#include "ehci-xilinx-of.c"
Grant Likely1f23b2d2010-06-02 13:53:17 -06001253#define XILINX_OF_PLATFORM_DRIVER ehci_hcd_xilinx_of_driver
Julie Zhu08d3c182009-09-21 16:08:19 -06001254#endif
1255
Lennert Buytenhek705a7522008-03-27 14:51:40 -04001256#ifdef CONFIG_PLAT_ORION
Tzachi Perelsteine96ffe22007-12-01 11:07:04 -05001257#include "ehci-orion.c"
1258#define PLATFORM_DRIVER ehci_orion_driver
1259#endif
1260
Vladimir Barinov91bc4d32007-12-30 15:21:11 -08001261#ifdef CONFIG_ARCH_IXP4XX
1262#include "ehci-ixp4xx.c"
1263#define PLATFORM_DRIVER ixp4xx_ehci_driver
1264#endif
1265
Wan ZongShun586dfc82009-06-13 09:14:28 +08001266#ifdef CONFIG_USB_W90X900_EHCI
1267#include "ehci-w90x900.c"
1268#define PLATFORM_DRIVER ehci_hcd_w90x900_driver
1269#endif
1270
Nicolas Ferre501c9c02009-07-27 14:47:40 -07001271#ifdef CONFIG_ARCH_AT91
1272#include "ehci-atmel.c"
1273#define PLATFORM_DRIVER ehci_atmel_driver
1274#endif
1275
David Daney1643acc2010-10-08 14:47:52 -07001276#ifdef CONFIG_USB_OCTEON_EHCI
1277#include "ehci-octeon.c"
1278#define PLATFORM_DRIVER ehci_octeon_driver
1279#endif
1280
Mac Lin760efe62010-11-25 23:58:00 +08001281#ifdef CONFIG_USB_CNS3XXX_EHCI
1282#include "ehci-cns3xxx.c"
1283#define PLATFORM_DRIVER cns3xxx_ehci_driver
1284#endif
1285
Alexey Charkovad78aca2010-11-07 19:28:55 +03001286#ifdef CONFIG_ARCH_VT8500
1287#include "ehci-vt8500.c"
1288#define PLATFORM_DRIVER vt8500_ehci_driver
1289#endif
1290
Deepak Sikric8c38de2010-11-10 14:33:18 +05301291#ifdef CONFIG_PLAT_SPEAR
1292#include "ehci-spear.c"
1293#define PLATFORM_DRIVER spear_ehci_hcd_driver
1294#endif
1295
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +05301296#ifdef CONFIG_USB_EHCI_MSM
1297#include "ehci-msm.c"
1298#define PLATFORM_DRIVER ehci_msm_driver
1299#endif
1300
Anoop22ced6872011-02-24 19:26:28 +05301301#ifdef CONFIG_USB_EHCI_HCD_PMC_MSP
1302#include "ehci-pmcmsp.c"
1303#define PLATFORM_DRIVER ehci_hcd_msp_driver
1304#endif
1305
Benoit Goby79ad3b52011-03-09 16:28:56 -08001306#ifdef CONFIG_USB_EHCI_TEGRA
1307#include "ehci-tegra.c"
1308#define PLATFORM_DRIVER tegra_ehci_driver
1309#endif
1310
Joonyoung Shim1bcc5aa2011-04-08 14:08:50 +09001311#ifdef CONFIG_USB_EHCI_S5P
1312#include "ehci-s5p.c"
1313#define PLATFORM_DRIVER s5p_ehci_driver
1314#endif
1315
Jan Andersson9be03922011-05-03 20:11:58 +02001316#ifdef CONFIG_SPARC_LEON
1317#include "ehci-grlib.c"
1318#define PLATFORM_DRIVER ehci_grlib_driver
1319#endif
1320
Jayachandran C3af51542011-11-18 12:12:42 +05301321#ifdef CONFIG_CPU_XLR
Jayachandran C23106342011-08-05 01:28:22 +05301322#include "ehci-xls.c"
1323#define PLATFORM_DRIVER ehci_xls_driver
1324#endif
1325
Neil Zhang3a082ec2011-12-20 13:20:23 +08001326#ifdef CONFIG_USB_EHCI_MV
1327#include "ehci-mv.c"
1328#define PLATFORM_DRIVER ehci_mv_driver
1329#endif
1330
Kelvin Cheungf30cdbc2012-01-18 14:41:16 +08001331#ifdef CONFIG_MACH_LOONGSON1
1332#include "ehci-ls1x.c"
1333#define PLATFORM_DRIVER ehci_ls1x_driver
1334#endif
1335
Steven J. Hillc2566672012-04-19 12:57:31 -05001336#ifdef CONFIG_MIPS_SEAD3
1337#include "ehci-sead3.c"
1338#define PLATFORM_DRIVER ehci_hcd_sead3_driver
1339#endif
1340
Hauke Mehrtens7a7a4a592012-03-13 01:04:48 +01001341#ifdef CONFIG_USB_EHCI_HCD_PLATFORM
1342#include "ehci-platform.c"
1343#define PLATFORM_DRIVER ehci_platform_driver
1344#endif
1345
Geoff Levandad75a412007-01-15 20:11:47 -08001346#if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
Grant Likely1f23b2d2010-06-02 13:53:17 -06001347 !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
1348 !defined(XILINX_OF_PLATFORM_DRIVER)
Matt Porter7ff71d62005-09-22 22:31:15 -07001349#error "missing bus glue for ehci-hcd"
1350#endif
Kumar Gala01cced22006-04-11 10:07:16 -05001351
1352static int __init ehci_hcd_init(void)
1353{
1354 int retval = 0;
1355
Alan Stern2b70f072008-10-02 11:47:15 -04001356 if (usb_disabled())
1357 return -ENODEV;
1358
1359 printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name);
Alan Stern9beeee62008-10-02 11:48:13 -04001360 set_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
1361 if (test_bit(USB_UHCI_LOADED, &usb_hcds_loaded) ||
1362 test_bit(USB_OHCI_LOADED, &usb_hcds_loaded))
1363 printk(KERN_WARNING "Warning! ehci_hcd should always be loaded"
1364 " before uhci_hcd and ohci_hcd, not after\n");
1365
Kumar Gala01cced22006-04-11 10:07:16 -05001366 pr_debug("%s: block sizes: qh %Zd qtd %Zd itd %Zd sitd %Zd\n",
1367 hcd_name,
1368 sizeof(struct ehci_qh), sizeof(struct ehci_qtd),
1369 sizeof(struct ehci_itd), sizeof(struct ehci_sitd));
1370
Tony Jones694cc202007-09-11 14:07:31 -07001371#ifdef DEBUG
Greg Kroah-Hartman08f4e582009-04-24 15:13:18 -07001372 ehci_debug_root = debugfs_create_dir("ehci", usb_debug_root);
Alan Stern9beeee62008-10-02 11:48:13 -04001373 if (!ehci_debug_root) {
1374 retval = -ENOENT;
1375 goto err_debug;
1376 }
Tony Jones694cc202007-09-11 14:07:31 -07001377#endif
1378
Kumar Gala01cced22006-04-11 10:07:16 -05001379#ifdef PLATFORM_DRIVER
1380 retval = platform_driver_register(&PLATFORM_DRIVER);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001381 if (retval < 0)
1382 goto clean0;
Kumar Gala01cced22006-04-11 10:07:16 -05001383#endif
1384
1385#ifdef PCI_DRIVER
1386 retval = pci_register_driver(&PCI_DRIVER);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001387 if (retval < 0)
1388 goto clean1;
Geoff Levandad75a412007-01-15 20:11:47 -08001389#endif
1390
1391#ifdef PS3_SYSTEM_BUS_DRIVER
Geoff Levand7a4eb7f2007-06-05 20:04:35 -07001392 retval = ps3_ehci_driver_register(&PS3_SYSTEM_BUS_DRIVER);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001393 if (retval < 0)
1394 goto clean2;
Kumar Gala01cced22006-04-11 10:07:16 -05001395#endif
1396
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001397#ifdef OF_PLATFORM_DRIVER
Grant Likelyd35fb642011-02-22 21:08:34 -07001398 retval = platform_driver_register(&OF_PLATFORM_DRIVER);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001399 if (retval < 0)
1400 goto clean3;
1401#endif
Grant Likely1f23b2d2010-06-02 13:53:17 -06001402
1403#ifdef XILINX_OF_PLATFORM_DRIVER
Grant Likelyd35fb642011-02-22 21:08:34 -07001404 retval = platform_driver_register(&XILINX_OF_PLATFORM_DRIVER);
Grant Likely1f23b2d2010-06-02 13:53:17 -06001405 if (retval < 0)
1406 goto clean4;
1407#endif
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001408 return retval;
1409
Grant Likely1f23b2d2010-06-02 13:53:17 -06001410#ifdef XILINX_OF_PLATFORM_DRIVER
Grant Likelyd35fb642011-02-22 21:08:34 -07001411 /* platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER); */
Grant Likely1f23b2d2010-06-02 13:53:17 -06001412clean4:
1413#endif
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001414#ifdef OF_PLATFORM_DRIVER
Grant Likelyd35fb642011-02-22 21:08:34 -07001415 platform_driver_unregister(&OF_PLATFORM_DRIVER);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001416clean3:
1417#endif
1418#ifdef PS3_SYSTEM_BUS_DRIVER
1419 ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1420clean2:
1421#endif
1422#ifdef PCI_DRIVER
1423 pci_unregister_driver(&PCI_DRIVER);
1424clean1:
1425#endif
1426#ifdef PLATFORM_DRIVER
1427 platform_driver_unregister(&PLATFORM_DRIVER);
1428clean0:
1429#endif
1430#ifdef DEBUG
1431 debugfs_remove(ehci_debug_root);
1432 ehci_debug_root = NULL;
Alan Stern9beeee62008-10-02 11:48:13 -04001433err_debug:
Linus Torvaldsa9b61482008-10-20 14:23:29 -07001434#endif
Alan Stern9beeee62008-10-02 11:48:13 -04001435 clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
Kumar Gala01cced22006-04-11 10:07:16 -05001436 return retval;
1437}
1438module_init(ehci_hcd_init);
1439
1440static void __exit ehci_hcd_cleanup(void)
1441{
Grant Likely1f23b2d2010-06-02 13:53:17 -06001442#ifdef XILINX_OF_PLATFORM_DRIVER
Grant Likelyd35fb642011-02-22 21:08:34 -07001443 platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER);
Grant Likely1f23b2d2010-06-02 13:53:17 -06001444#endif
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001445#ifdef OF_PLATFORM_DRIVER
Grant Likelyd35fb642011-02-22 21:08:34 -07001446 platform_driver_unregister(&OF_PLATFORM_DRIVER);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001447#endif
Kumar Gala01cced22006-04-11 10:07:16 -05001448#ifdef PLATFORM_DRIVER
1449 platform_driver_unregister(&PLATFORM_DRIVER);
1450#endif
1451#ifdef PCI_DRIVER
1452 pci_unregister_driver(&PCI_DRIVER);
1453#endif
Geoff Levandad75a412007-01-15 20:11:47 -08001454#ifdef PS3_SYSTEM_BUS_DRIVER
Geoff Levand7a4eb7f2007-06-05 20:04:35 -07001455 ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
Geoff Levandad75a412007-01-15 20:11:47 -08001456#endif
Tony Jones694cc202007-09-11 14:07:31 -07001457#ifdef DEBUG
1458 debugfs_remove(ehci_debug_root);
1459#endif
Alan Stern9beeee62008-10-02 11:48:13 -04001460 clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
Kumar Gala01cced22006-04-11 10:07:16 -05001461}
1462module_exit(ehci_hcd_cleanup);
1463
Alexander Shishkineb70e5a2012-05-11 17:25:54 +03001464#endif /* CHIPIDEA_EHCI */