blob: 9f26080889f5602c8056061192b1f9db3abb45ac [file] [log] [blame]
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/* Initial IRQ latency: faster than hw default */
97static int log2_irq_thresh = 0; // 0 to 6
98module_param (log2_irq_thresh, int, S_IRUGO);
99MODULE_PARM_DESC (log2_irq_thresh, "log2 IRQ latency, 1-64 microframes");
100
101/* initial park setting: slower than hw default */
102static unsigned park = 0;
103module_param (park, uint, S_IRUGO);
104MODULE_PARM_DESC (park, "park setting; 1-3 back-to-back async packets");
105
David Brownell93f1a472006-11-16 23:34:58 -0800106/* for flakey hardware, ignore overcurrent indicators */
Rusty Russell90ab5ee2012-01-13 09:32:20 +1030107static bool ignore_oc = 0;
David Brownell93f1a472006-11-16 23:34:58 -0800108module_param (ignore_oc, bool, S_IRUGO);
109MODULE_PARM_DESC (ignore_oc, "ignore bogus hardware overcurrent indications");
110
Alek Du48f24972010-06-04 15:47:55 +0800111/* for link power management(LPM) feature */
112static unsigned int hird;
113module_param(hird, int, S_IRUGO);
Niels de Voscc556872011-05-31 23:00:10 +0100114MODULE_PARM_DESC(hird, "host initiated resume duration, +1 for each 75us");
Alek Du48f24972010-06-04 15:47:55 +0800115
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116#define INTR_MASK (STS_IAA | STS_FATAL | STS_PCD | STS_ERR | STS_INT)
117
118/*-------------------------------------------------------------------------*/
119
120#include "ehci.h"
121#include "ehci-dbg.c"
Andiry Xuad935622011-03-01 14:57:05 +0800122#include "pci-quirks.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
124/*-------------------------------------------------------------------------*/
125
126/*
127 * handshake - spin reading hc until handshake completes or fails
128 * @ptr: address of hc register to be read
129 * @mask: bits to look at in result of read
130 * @done: value of those bits when handshake succeeds
131 * @usec: timeout in microseconds
132 *
133 * Returns negative errno, or zero on success
134 *
135 * Success happens when the "mask" bits have the specified value (hardware
136 * handshake done). There are two failure modes: "usec" have passed (major
137 * hardware flakeout), or the register reads as all-ones (hardware removed).
138 *
139 * That last failure should_only happen in cases like physical cardbus eject
140 * before driver shutdown. But it also seems to be caused by bugs in cardbus
141 * bridge shutdown: shutting down the bridge before the devices using it.
142 */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100143static int handshake (struct ehci_hcd *ehci, void __iomem *ptr,
144 u32 mask, u32 done, int usec)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145{
146 u32 result;
147
148 do {
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100149 result = ehci_readl(ehci, ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 if (result == ~(u32)0) /* card removed */
151 return -ENODEV;
152 result &= mask;
153 if (result == done)
154 return 0;
155 udelay (1);
156 usec--;
157 } while (usec > 0);
158 return -ETIMEDOUT;
159}
160
Matthieu CASTET65fd4272010-09-06 18:26:56 +0200161/* check TDI/ARC silicon is in host mode */
162static int tdi_in_host_mode (struct ehci_hcd *ehci)
163{
Matthieu CASTET65fd4272010-09-06 18:26:56 +0200164 u32 tmp;
165
Alan Sterna46af4e2012-06-25 12:19:03 -0400166 tmp = ehci_readl(ehci, &ehci->regs->usbmode);
Matthieu CASTET65fd4272010-09-06 18:26:56 +0200167 return (tmp & 3) == USBMODE_CM_HC;
168}
169
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170/* force HC to halt state from unknown (EHCI spec section 2.3) */
171static int ehci_halt (struct ehci_hcd *ehci)
172{
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100173 u32 temp = ehci_readl(ehci, &ehci->regs->status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
David Brownell72f30b62005-09-27 10:19:39 -0700175 /* disable any irqs left enabled by previous code */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100176 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
David Brownell72f30b62005-09-27 10:19:39 -0700177
Matthieu CASTET65fd4272010-09-06 18:26:56 +0200178 if (ehci_is_TDI(ehci) && tdi_in_host_mode(ehci) == 0) {
179 return 0;
180 }
181
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 if ((temp & STS_HALT) != 0)
183 return 0;
184
Alan Stern3d9545c2012-04-23 13:54:36 -0400185 /*
186 * This routine gets called during probe before ehci->command
187 * has been initialized, so we can't rely on its value.
188 */
189 ehci->command &= ~CMD_RUN;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100190 temp = ehci_readl(ehci, &ehci->regs->command);
Alan Stern3d9545c2012-04-23 13:54:36 -0400191 temp &= ~(CMD_RUN | CMD_IAAD);
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100192 ehci_writel(ehci, temp, &ehci->regs->command);
193 return handshake (ehci, &ehci->regs->status,
194 STS_HALT, STS_HALT, 16 * 125);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195}
196
197/* put TDI/ARC silicon into EHCI mode */
198static void tdi_reset (struct ehci_hcd *ehci)
199{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 u32 tmp;
201
Alan Sterna46af4e2012-06-25 12:19:03 -0400202 tmp = ehci_readl(ehci, &ehci->regs->usbmode);
Vladimir Barinovd23a1372007-05-23 20:07:48 +0400203 tmp |= USBMODE_CM_HC;
204 /* The default byte access to MMR space is LE after
205 * controller reset. Set the required endian mode
206 * for transfer buffers to match the host microprocessor
207 */
208 if (ehci_big_endian_mmio(ehci))
209 tmp |= USBMODE_BE;
Alan Sterna46af4e2012-06-25 12:19:03 -0400210 ehci_writel(ehci, tmp, &ehci->regs->usbmode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211}
212
213/* reset a non-running (STS_HALT == 1) controller */
214static int ehci_reset (struct ehci_hcd *ehci)
215{
216 int retval;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100217 u32 command = ehci_readl(ehci, &ehci->regs->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218
Jason Wessel8d053c72009-08-20 15:39:54 -0500219 /* If the EHCI debug controller is active, special care must be
220 * taken before and after a host controller reset */
221 if (ehci->debug && !dbgp_reset_prep())
222 ehci->debug = NULL;
223
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 command |= CMD_RESET;
225 dbg_cmd (ehci, "reset", command);
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100226 ehci_writel(ehci, command, &ehci->regs->command);
Alan Sterne8799902011-08-18 16:31:30 -0400227 ehci->rh_state = EHCI_RH_HALTED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 ehci->next_statechange = jiffies;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100229 retval = handshake (ehci, &ehci->regs->command,
230 CMD_RESET, 0, 250 * 1000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
Alek Du331ac6b2009-07-13 12:41:20 +0800232 if (ehci->has_hostpc) {
233 ehci_writel(ehci, USBMODE_EX_HC | USBMODE_EX_VBPS,
Alan Sterna46af4e2012-06-25 12:19:03 -0400234 &ehci->regs->usbmode_ex);
235 ehci_writel(ehci, TXFIFO_DEFAULT, &ehci->regs->txfill_tuning);
Alek Du331ac6b2009-07-13 12:41:20 +0800236 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 if (retval)
238 return retval;
239
240 if (ehci_is_TDI(ehci))
241 tdi_reset (ehci);
242
Jason Wessel8d053c72009-08-20 15:39:54 -0500243 if (ehci->debug)
244 dbgp_external_startup();
245
Alan Sterna448e4d2012-04-03 15:24:30 -0400246 ehci->port_c_suspend = ehci->suspended_ports =
247 ehci->resuming_ports = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 return retval;
249}
250
251/* idle the controller (from running) */
252static void ehci_quiesce (struct ehci_hcd *ehci)
253{
254 u32 temp;
255
Alan Sterne8799902011-08-18 16:31:30 -0400256 if (ehci->rh_state != EHCI_RH_RUNNING)
Alan Sternc0c53db2012-07-11 11:21:48 -0400257 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258
259 /* wait for any schedule enables/disables to take effect */
Alan Stern3d9545c2012-04-23 13:54:36 -0400260 temp = (ehci->command << 10) & (STS_ASS | STS_PSS);
Alan Stern9671cd72012-07-11 11:22:16 -0400261 handshake(ehci, &ehci->regs->status, STS_ASS | STS_PSS, temp, 16 * 125);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262
263 /* then disable anything that's still active */
Alan Stern3d9545c2012-04-23 13:54:36 -0400264 ehci->command &= ~(CMD_ASE | CMD_PSE);
265 ehci_writel(ehci, ehci->command, &ehci->regs->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266
267 /* hardware can take 16 microframes to turn off ... */
Alan Stern9671cd72012-07-11 11:22:16 -0400268 handshake(ehci, &ehci->regs->status, STS_ASS | STS_PSS, 0, 16 * 125);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269}
270
271/*-------------------------------------------------------------------------*/
272
Alan Stern07d29b62007-12-11 16:05:30 -0500273static void end_unlink_async(struct ehci_hcd *ehci);
Alan Stern32830f22012-07-11 11:22:53 -0400274static void unlink_empty_async(struct ehci_hcd *ehci);
David Howells7d12e782006-10-05 14:55:46 +0100275static void ehci_work(struct ehci_hcd *ehci);
Alan Sterndf202252012-07-11 11:22:26 -0400276static void start_unlink_intr(struct ehci_hcd *ehci, struct ehci_qh *qh);
277static void end_unlink_intr(struct ehci_hcd *ehci, struct ehci_qh *qh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278
Alan Sternd58b4bc2012-07-11 11:21:54 -0400279#include "ehci-timer.c"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280#include "ehci-hub.c"
Alek Du48f24972010-06-04 15:47:55 +0800281#include "ehci-lpm.c"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282#include "ehci-mem.c"
283#include "ehci-q.c"
284#include "ehci-sched.c"
Kirill Smelkov4c670452011-07-03 20:36:56 +0400285#include "ehci-sysfs.c"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286
287/*-------------------------------------------------------------------------*/
288
Alan Stern89037952007-02-13 14:55:27 -0500289/* On some systems, leaving remote wakeup enabled prevents system shutdown.
290 * The firmware seems to think that powering off is a wakeup event!
291 * This routine turns off remote wakeup and everything else, on all ports.
292 */
293static void ehci_turn_off_all_ports(struct ehci_hcd *ehci)
294{
295 int port = HCS_N_PORTS(ehci->hcs_params);
296
297 while (port--)
298 ehci_writel(ehci, PORT_RWC_BITS,
299 &ehci->regs->port_status[port]);
300}
301
Sarah Sharp21da84a2008-04-08 14:30:18 -0700302/*
303 * Halt HC, turn off all ports, and let the BIOS use the companion controllers.
304 * Should be called with ehci->lock held.
David Brownell72f30b62005-09-27 10:19:39 -0700305 */
Sarah Sharp21da84a2008-04-08 14:30:18 -0700306static void ehci_silence_controller(struct ehci_hcd *ehci)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307{
Sarah Sharp21da84a2008-04-08 14:30:18 -0700308 ehci_halt(ehci);
Alan Stern89037952007-02-13 14:55:27 -0500309 ehci_turn_off_all_ports(ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310
311 /* make BIOS/etc use companion controller during reboot */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100312 ehci_writel(ehci, 0, &ehci->regs->configured_flag);
Alan Stern89037952007-02-13 14:55:27 -0500313
314 /* unblock posted writes */
315 ehci_readl(ehci, &ehci->regs->configured_flag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316}
317
Sarah Sharp21da84a2008-04-08 14:30:18 -0700318/* ehci_shutdown kick in for silicon on any bus (not just pci, etc).
319 * This forcibly disables dma and IRQs, helping kexec and other cases
320 * where the next system software may expect clean state.
321 */
322static void ehci_shutdown(struct usb_hcd *hcd)
323{
324 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
325
Sarah Sharp21da84a2008-04-08 14:30:18 -0700326 spin_lock_irq(&ehci->lock);
Alan Sternc0c53db2012-07-11 11:21:48 -0400327 ehci->rh_state = EHCI_RH_STOPPING;
Sarah Sharp21da84a2008-04-08 14:30:18 -0700328 ehci_silence_controller(ehci);
Alan Sternd58b4bc2012-07-11 11:21:54 -0400329 ehci->enabled_hrtimer_events = 0;
Sarah Sharp21da84a2008-04-08 14:30:18 -0700330 spin_unlock_irq(&ehci->lock);
Alan Sternd58b4bc2012-07-11 11:21:54 -0400331
332 hrtimer_cancel(&ehci->hrtimer);
Sarah Sharp21da84a2008-04-08 14:30:18 -0700333}
334
David Brownell56c1e262005-04-09 09:00:29 -0700335static void ehci_port_power (struct ehci_hcd *ehci, int is_on)
336{
337 unsigned port;
338
339 if (!HCS_PPC (ehci->hcs_params))
340 return;
341
342 ehci_dbg (ehci, "...power%s ports...\n", is_on ? "up" : "down");
343 for (port = HCS_N_PORTS (ehci->hcs_params); port > 0; )
344 (void) ehci_hub_control(ehci_to_hcd(ehci),
345 is_on ? SetPortFeature : ClearPortFeature,
346 USB_PORT_FEAT_POWER,
347 port--, NULL, 0);
Alan Stern383975d2007-05-04 11:52:40 -0400348 /* Flush those writes */
349 ehci_readl(ehci, &ehci->regs->command);
David Brownell56c1e262005-04-09 09:00:29 -0700350 msleep(20);
351}
352
Matt Porter7ff71d62005-09-22 22:31:15 -0700353/*-------------------------------------------------------------------------*/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354
Matt Porter7ff71d62005-09-22 22:31:15 -0700355/*
356 * ehci_work is called from some interrupts, timers, and so on.
357 * it calls driver completion functions, after dropping ehci->lock.
358 */
David Howells7d12e782006-10-05 14:55:46 +0100359static void ehci_work (struct ehci_hcd *ehci)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360{
Matt Porter7ff71d62005-09-22 22:31:15 -0700361 /* another CPU may drop ehci->lock during a schedule scan while
362 * it reports urb completions. this flag guards against bogus
363 * attempts at re-entrant schedule scanning.
364 */
Alan Stern361aabf2012-07-11 11:22:57 -0400365 if (ehci->scanning) {
366 ehci->need_rescan = true;
Matt Porter7ff71d62005-09-22 22:31:15 -0700367 return;
Alan Stern361aabf2012-07-11 11:22:57 -0400368 }
369 ehci->scanning = true;
370
371 rescan:
372 ehci->need_rescan = false;
Alan Stern31446612012-07-11 11:22:21 -0400373 if (ehci->async_count)
374 scan_async(ehci);
Alan Stern569b3942012-07-11 11:23:00 -0400375 if (ehci->intr_count > 0)
376 scan_intr(ehci);
377 if (ehci->isoc_count > 0)
378 scan_isoc(ehci);
Alan Stern361aabf2012-07-11 11:22:57 -0400379 if (ehci->need_rescan)
380 goto rescan;
381 ehci->scanning = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382
Matt Porter7ff71d62005-09-22 22:31:15 -0700383 /* the IO watchdog guards against hardware or driver bugs that
384 * misplace IRQs, and should let us run completely without IRQs.
385 * such lossage has been observed on both VT6202 and VT8235.
386 */
Alan Stern18aafe62012-07-11 11:23:04 -0400387 turn_on_io_watchdog(ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388}
389
Sarah Sharp21da84a2008-04-08 14:30:18 -0700390/*
391 * Called when the ehci_hcd module is removed.
392 */
Matt Porter7ff71d62005-09-22 22:31:15 -0700393static void ehci_stop (struct usb_hcd *hcd)
394{
395 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
396
397 ehci_dbg (ehci, "stop\n");
398
Matt Porter7ff71d62005-09-22 22:31:15 -0700399 /* no more interrupts ... */
Matt Porter7ff71d62005-09-22 22:31:15 -0700400
401 spin_lock_irq(&ehci->lock);
Alan Sternd58b4bc2012-07-11 11:21:54 -0400402 ehci->enabled_hrtimer_events = 0;
Alan Sternc0c53db2012-07-11 11:21:48 -0400403 ehci_quiesce(ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700404
Sarah Sharp21da84a2008-04-08 14:30:18 -0700405 ehci_silence_controller(ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700406 ehci_reset (ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700407 spin_unlock_irq(&ehci->lock);
408
Alan Sternd58b4bc2012-07-11 11:21:54 -0400409 hrtimer_cancel(&ehci->hrtimer);
Kirill Smelkov4c670452011-07-03 20:36:56 +0400410 remove_sysfs_files(ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700411 remove_debug_files (ehci);
412
413 /* root hub is shut down separately (first, when possible) */
414 spin_lock_irq (&ehci->lock);
415 if (ehci->async)
David Howells7d12e782006-10-05 14:55:46 +0100416 ehci_work (ehci);
Alan Stern55934eb2012-07-11 11:22:35 -0400417 end_free_itds(ehci);
Matt Porter7ff71d62005-09-22 22:31:15 -0700418 spin_unlock_irq (&ehci->lock);
419 ehci_mem_cleanup (ehci);
420
Andiry Xuad935622011-03-01 14:57:05 +0800421 if (ehci->amd_pll_fix == 1)
422 usb_amd_dev_put();
Alex He05570292010-12-07 10:10:08 +0800423
Matt Porter7ff71d62005-09-22 22:31:15 -0700424#ifdef EHCI_STATS
Alan Stern99ac5b12012-07-11 11:21:38 -0400425 ehci_dbg(ehci, "irq normal %ld err %ld iaa %ld (lost %ld)\n",
426 ehci->stats.normal, ehci->stats.error, ehci->stats.iaa,
Matt Porter7ff71d62005-09-22 22:31:15 -0700427 ehci->stats.lost_iaa);
428 ehci_dbg (ehci, "complete %ld unlink %ld\n",
429 ehci->stats.complete, ehci->stats.unlink);
430#endif
431
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100432 dbg_status (ehci, "ehci_stop completed",
433 ehci_readl(ehci, &ehci->regs->status));
Matt Porter7ff71d62005-09-22 22:31:15 -0700434}
435
David Brownell18807522005-11-23 15:45:37 -0800436/* one-time init, only for memory state */
437static int ehci_init(struct usb_hcd *hcd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438{
David Brownell18807522005-11-23 15:45:37 -0800439 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 u32 temp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 int retval;
442 u32 hcc_params;
Alek Du3807e262009-07-14 07:23:29 +0800443 struct ehci_qh_hw *hw;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444
David Brownell18807522005-11-23 15:45:37 -0800445 spin_lock_init(&ehci->lock);
446
Alek Du403dbd32009-07-13 17:30:41 +0800447 /*
448 * keep io watchdog by default, those good HCDs could turn off it later
449 */
450 ehci->need_io_watchdog = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451
Alan Sternd58b4bc2012-07-11 11:21:54 -0400452 hrtimer_init(&ehci->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
453 ehci->hrtimer.function = ehci_hrtimer_func;
454 ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT;
455
Alan Sternf75593c2011-01-06 10:17:09 -0500456 hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params);
457
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 /*
Kirill Smelkovcc62a7e2011-07-03 20:36:57 +0400459 * by default set standard 80% (== 100 usec/uframe) max periodic
460 * bandwidth as required by USB 2.0
461 */
462 ehci->uframe_periodic_max = 100;
463
464 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 * hw default: 1K periodic list heads, one per frame.
466 * periodic_size can shrink by USBCMD update if hcc_params allows.
467 */
468 ehci->periodic_size = DEFAULT_I_TDPS;
Alan Stern569b3942012-07-11 11:23:00 -0400469 INIT_LIST_HEAD(&ehci->intr_qh_list);
Karsten Wiese9aa09d22009-02-08 16:07:58 -0800470 INIT_LIST_HEAD(&ehci->cached_itd_list);
Alan Stern0e5f2312010-04-08 16:56:37 -0400471 INIT_LIST_HEAD(&ehci->cached_sitd_list);
Alan Sternf75593c2011-01-06 10:17:09 -0500472
Greg Kroah-Hartman8e192912012-05-21 08:54:43 -0700473 if (HCC_PGM_FRAMELISTLEN(hcc_params)) {
Alan Sternf75593c2011-01-06 10:17:09 -0500474 /* periodic schedule size can be smaller than default */
475 switch (EHCI_TUNE_FLS) {
476 case 0: ehci->periodic_size = 1024; break;
477 case 1: ehci->periodic_size = 512; break;
478 case 2: ehci->periodic_size = 256; break;
479 default: BUG();
480 }
481 }
David Brownell18807522005-11-23 15:45:37 -0800482 if ((retval = ehci_mem_init(ehci, GFP_KERNEL)) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 return retval;
484
485 /* controllers may cache some of the periodic schedule ... */
David Brownell53bd6a62006-08-30 14:50:06 -0700486 if (HCC_ISOC_CACHE(hcc_params)) // full frame cache
Sarah Sharpdccd5742009-10-27 10:55:05 -0700487 ehci->i_thresh = 2 + 8;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 else // N microframes cached
David Brownell18807522005-11-23 15:45:37 -0800489 ehci->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 ehci->next_uframe = -1;
Karsten Wiese9aa09d22009-02-08 16:07:58 -0800492 ehci->clock_frame = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 /*
495 * dedicate a qh for the async ring head, since we couldn't unlink
496 * a 'real' qh without stopping the async schedule [4.8]. use it
497 * as the 'reclamation list head' too.
498 * its dummy is used in hw_alt_next of many tds, to prevent the qh
499 * from automatically advancing to the next td after short reads.
500 */
David Brownell18807522005-11-23 15:45:37 -0800501 ehci->async->qh_next.qh = NULL;
Alek Du3807e262009-07-14 07:23:29 +0800502 hw = ehci->async->hw;
503 hw->hw_next = QH_NEXT(ehci, ehci->async->qh_dma);
504 hw->hw_info1 = cpu_to_hc32(ehci, QH_HEAD);
Ricardo Martins4f7a67e2012-05-22 18:02:03 +0100505#if defined(CONFIG_PPC_PS3)
Alan Stern4c53de72012-07-11 11:21:32 -0400506 hw->hw_info1 |= cpu_to_hc32(ehci, QH_INACTIVATE);
Ricardo Martins4f7a67e2012-05-22 18:02:03 +0100507#endif
Alek Du3807e262009-07-14 07:23:29 +0800508 hw->hw_token = cpu_to_hc32(ehci, QTD_STS_HALT);
509 hw->hw_qtd_next = EHCI_LIST_END(ehci);
David Brownell18807522005-11-23 15:45:37 -0800510 ehci->async->qh_state = QH_STATE_LINKED;
Alek Du3807e262009-07-14 07:23:29 +0800511 hw->hw_alt_next = QTD_NEXT(ehci, ehci->async->dummy->qtd_dma);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512
513 /* clear interrupt enables, set irq latency */
514 if (log2_irq_thresh < 0 || log2_irq_thresh > 6)
515 log2_irq_thresh = 0;
516 temp = 1 << (16 + log2_irq_thresh);
Alek Du5a9cdf32010-06-04 15:47:56 +0800517 if (HCC_PER_PORT_CHANGE_EVENT(hcc_params)) {
518 ehci->has_ppcd = 1;
519 ehci_dbg(ehci, "enable per-port change event\n");
520 temp |= CMD_PPCEE;
521 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 if (HCC_CANPARK(hcc_params)) {
523 /* HW default park == 3, on hardware that supports it (like
524 * NVidia and ALI silicon), maximizes throughput on the async
525 * schedule by avoiding QH fetches between transfers.
526 *
527 * With fast usb storage devices and NForce2, "park" seems to
528 * make problems: throughput reduction (!), data errors...
529 */
530 if (park) {
David Brownell18807522005-11-23 15:45:37 -0800531 park = min(park, (unsigned) 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 temp |= CMD_PARK;
533 temp |= park << 8;
534 }
David Brownell18807522005-11-23 15:45:37 -0800535 ehci_dbg(ehci, "park %d\n", park);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 }
David Brownell18807522005-11-23 15:45:37 -0800537 if (HCC_PGM_FRAMELISTLEN(hcc_params)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 /* periodic schedule size can be smaller than default */
539 temp &= ~(3 << 2);
540 temp |= (EHCI_TUNE_FLS << 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541 }
Alek Du48f24972010-06-04 15:47:55 +0800542 if (HCC_LPM(hcc_params)) {
543 /* support link power management EHCI 1.1 addendum */
544 ehci_dbg(ehci, "support lpm\n");
545 ehci->has_lpm = 1;
546 if (hird > 0xf) {
547 ehci_dbg(ehci, "hird %d invalid, use default 0",
548 hird);
549 hird = 0;
550 }
551 temp |= hird << 24;
552 }
David Brownell18807522005-11-23 15:45:37 -0800553 ehci->command = temp;
554
Alan Stern40f8db82009-11-06 12:29:40 -0500555 /* Accept arbitrarily long scatter-gather lists */
Andrea Righi4307a282010-06-28 16:56:45 +0200556 if (!(hcd->driver->flags & HCD_LOCAL_MEM))
557 hcd->self.sg_tablesize = ~0;
David Brownell18807522005-11-23 15:45:37 -0800558 return 0;
559}
560
561/* start HC running; it's halted, ehci_init() has been run (once) */
562static int ehci_run (struct usb_hcd *hcd)
563{
564 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
David Brownell18807522005-11-23 15:45:37 -0800565 u32 temp;
566 u32 hcc_params;
567
Marcelo Tosatti1d619f12007-01-21 19:45:59 -0200568 hcd->uses_new_polling = 1;
Marcelo Tosatti1d619f12007-01-21 19:45:59 -0200569
David Brownell18807522005-11-23 15:45:37 -0800570 /* EHCI spec section 4.1 */
Geoff Levand876e0df2011-11-22 18:04:45 -0800571
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100572 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
573 ehci_writel(ehci, (u32)ehci->async->qh_dma, &ehci->regs->async_next);
David Brownell18807522005-11-23 15:45:37 -0800574
575 /*
576 * hcc_params controls whether ehci->regs->segment must (!!!)
577 * be used; it constrains QH/ITD/SITD and QTD locations.
578 * pci_pool consistent memory always uses segment zero.
579 * streaming mappings for I/O buffers, like pci_map_single(),
580 * can return segments above 4GB, if the device allows.
581 *
582 * NOTE: the dma mask is visible through dma_supported(), so
583 * drivers can pass this info along ... like NETIF_F_HIGHDMA,
584 * Scsi_Host.highmem_io, and so forth. It's readonly to all
585 * host side drivers though.
586 */
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100587 hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params);
David Brownell18807522005-11-23 15:45:37 -0800588 if (HCC_64BIT_ADDR(hcc_params)) {
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100589 ehci_writel(ehci, 0, &ehci->regs->segment);
David Brownell18807522005-11-23 15:45:37 -0800590#if 0
591// this is deeply broken on almost all architectures
Yang Hongyang6a355282009-04-06 19:01:13 -0700592 if (!dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64)))
David Brownell18807522005-11-23 15:45:37 -0800593 ehci_info(ehci, "enabled 64bit DMA\n");
594#endif
595 }
596
597
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 // Philips, Intel, and maybe others need CMD_RUN before the
599 // root hub will detect new devices (why?); NEC doesn't
David Brownell18807522005-11-23 15:45:37 -0800600 ehci->command &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET);
601 ehci->command |= CMD_RUN;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100602 ehci_writel(ehci, ehci->command, &ehci->regs->command);
David Brownell18807522005-11-23 15:45:37 -0800603 dbg_cmd (ehci, "init", ehci->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 /*
606 * Start, enabling full USB 2.0 functionality ... usb 1.1 devices
607 * are explicitly handed to companion controller(s), so no TT is
608 * involved with the root hub. (Except where one is integrated,
609 * and there's no companion controller unless maybe for USB OTG.)
Alan Stern32fe0192007-10-10 16:27:07 -0400610 *
611 * Turning on the CF flag will transfer ownership of all ports
612 * from the companions to the EHCI controller. If any of the
613 * companions are in the middle of a port reset at the time, it
614 * could cause trouble. Write-locking ehci_cf_port_reset_rwsem
David Brownell1cb52652007-11-13 16:22:30 -0800615 * guarantees that no resets are in progress. After we set CF,
616 * a short delay lets the hardware catch up; new resets shouldn't
617 * be started before the port switching actions could complete.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 */
Alan Stern32fe0192007-10-10 16:27:07 -0400619 down_write(&ehci_cf_port_reset_rwsem);
Alan Sterne8799902011-08-18 16:31:30 -0400620 ehci->rh_state = EHCI_RH_RUNNING;
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100621 ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
622 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
David Brownell1cb52652007-11-13 16:22:30 -0800623 msleep(5);
Alan Stern32fe0192007-10-10 16:27:07 -0400624 up_write(&ehci_cf_port_reset_rwsem);
Oliver Neukumee4ecb82009-11-27 15:17:59 +0100625 ehci->last_periodic_enable = ktime_get_real();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626
Jan Anderssonc4301312011-05-03 20:11:57 +0200627 temp = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 ehci_info (ehci,
Alan Stern2b70f072008-10-02 11:47:15 -0400629 "USB %x.%x started, EHCI %x.%02x%s\n",
Matt Porter7ff71d62005-09-22 22:31:15 -0700630 ((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f),
Alan Stern2b70f072008-10-02 11:47:15 -0400631 temp >> 8, temp & 0xff,
David Brownell93f1a472006-11-16 23:34:58 -0800632 ignore_oc ? ", overcurrent ignored" : "");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100634 ehci_writel(ehci, INTR_MASK,
635 &ehci->regs->intr_enable); /* Turn On Interrupts */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636
David Brownell18807522005-11-23 15:45:37 -0800637 /* GRR this is run-once init(), being done every time the HC starts.
638 * So long as they're part of class devices, we can't do it init()
639 * since the class device isn't created that early.
640 */
641 create_debug_files(ehci);
Kirill Smelkov4c670452011-07-03 20:36:56 +0400642 create_sysfs_files(ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643
644 return 0;
645}
646
Alan Stern1a49e2a2012-07-09 15:55:14 -0400647static int ehci_setup(struct usb_hcd *hcd)
Matthieu CASTET2093c6b2011-07-02 19:47:33 +0200648{
649 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
650 int retval;
651
652 ehci->regs = (void __iomem *)ehci->caps +
653 HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
654 dbg_hcs_params(ehci, "reset");
655 dbg_hcc_params(ehci, "reset");
656
657 /* cache this readonly data; minimize chip reads */
658 ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
659
660 ehci->sbrn = HCD_USB2;
661
Alan Stern631fe9d2012-07-11 11:21:09 -0400662 /* data structure init */
663 retval = ehci_init(hcd);
Matthieu CASTET2093c6b2011-07-02 19:47:33 +0200664 if (retval)
665 return retval;
666
Alan Stern631fe9d2012-07-11 11:21:09 -0400667 retval = ehci_halt(ehci);
Matthieu CASTET2093c6b2011-07-02 19:47:33 +0200668 if (retval)
669 return retval;
670
Alan Stern1a49e2a2012-07-09 15:55:14 -0400671 if (ehci_is_TDI(ehci))
672 tdi_reset(ehci);
673
Matthieu CASTET2093c6b2011-07-02 19:47:33 +0200674 ehci_reset(ehci);
675
676 return 0;
677}
678
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679/*-------------------------------------------------------------------------*/
680
David Howells7d12e782006-10-05 14:55:46 +0100681static irqreturn_t ehci_irq (struct usb_hcd *hcd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682{
683 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
Alan Stern67b2e022008-11-12 17:04:53 -0500684 u32 status, masked_status, pcd_status = 0, cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 int bh;
686
687 spin_lock (&ehci->lock);
688
Benjamin Herrenschmidt083522d2006-12-15 06:54:08 +1100689 status = ehci_readl(ehci, &ehci->regs->status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690
691 /* e.g. cardbus physical eject */
692 if (status == ~(u32) 0) {
693 ehci_dbg (ehci, "device removed\n");
694 goto dead;
695 }
696
Alan Stern2fbe2bf2012-04-18 11:33:00 -0400697 /*
698 * We don't use STS_FLR, but some controllers don't like it to
699 * remain on, so mask it out along with the other status bits.
700 */
701 masked_status = status & (INTR_MASK | STS_FLR);
702
Alan Stern69fff592011-05-17 17:27:12 -0400703 /* Shared IRQ? */
Alan Sterne8799902011-08-18 16:31:30 -0400704 if (!masked_status || unlikely(ehci->rh_state == EHCI_RH_HALTED)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 spin_unlock(&ehci->lock);
706 return IRQ_NONE;
707 }
708
709 /* clear (just) interrupts */
Alan Stern67b2e022008-11-12 17:04:53 -0500710 ehci_writel(ehci, masked_status, &ehci->regs->status);
David Brownelle82cc122008-03-07 13:49:42 -0800711 cmd = ehci_readl(ehci, &ehci->regs->command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 bh = 0;
713
David Brownell9776afc2008-02-01 11:42:05 -0800714#ifdef VERBOSE_DEBUG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 /* unrequested/ignored: Frame List Rollover */
716 dbg_status (ehci, "irq", status);
717#endif
718
719 /* INT, ERR, and IAA interrupt rates can be throttled */
720
721 /* normal [4.15.1.2] or error [4.15.1.1] completion */
722 if (likely ((status & (STS_INT|STS_ERR)) != 0)) {
723 if (likely ((status & STS_ERR) == 0))
724 COUNT (ehci->stats.normal);
725 else
726 COUNT (ehci->stats.error);
727 bh = 1;
728 }
729
730 /* complete the unlinking of some qh [4.15.2.3] */
731 if (status & STS_IAA) {
Alan Stern9d938742012-07-11 11:22:44 -0400732
733 /* Turn off the IAA watchdog */
734 ehci->enabled_hrtimer_events &= ~BIT(EHCI_HRTIMER_IAA_WATCHDOG);
735
736 /*
737 * Mild optimization: Allow another IAAD to reset the
738 * hrtimer, if one occurs before the next expiration.
739 * In theory we could always cancel the hrtimer, but
740 * tests show that about half the time it will be reset
741 * for some other event anyway.
742 */
743 if (ehci->next_hrtimer_event == EHCI_HRTIMER_IAA_WATCHDOG)
744 ++ehci->next_hrtimer_event;
745
David Brownelle82cc122008-03-07 13:49:42 -0800746 /* guard against (alleged) silicon errata */
Alan Stern6feff1b2012-04-17 15:23:25 -0400747 if (cmd & CMD_IAAD)
David Brownelle82cc122008-03-07 13:49:42 -0800748 ehci_dbg(ehci, "IAA with IAAD still set?\n");
Alan Stern3c273a02012-07-11 11:22:49 -0400749 if (ehci->async_iaa) {
Alan Stern99ac5b12012-07-11 11:21:38 -0400750 COUNT(ehci->stats.iaa);
David Brownelle82cc122008-03-07 13:49:42 -0800751 end_unlink_async(ehci);
752 } else
Alan Stern99ac5b12012-07-11 11:21:38 -0400753 ehci_dbg(ehci, "IAA with nothing unlinked?\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 }
755
756 /* remote wakeup [4.3.1] */
David Brownelld97cc2f2005-12-22 17:05:18 -0800757 if (status & STS_PCD) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 unsigned i = HCS_N_PORTS (ehci->hcs_params);
Alek Du5a9cdf32010-06-04 15:47:56 +0800759 u32 ppcd = 0;
David Brownelld1b18422008-03-05 23:37:52 -0800760
761 /* kick root hub later */
Marcelo Tosatti1d619f12007-01-21 19:45:59 -0200762 pcd_status = status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763
764 /* resume root hub? */
Alan Sterndc75ce92012-04-17 15:24:15 -0400765 if (ehci->rh_state == EHCI_RH_SUSPENDED)
Alan Stern8c033562006-11-09 14:42:16 -0500766 usb_hcd_resume_root_hub(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767
Alek Du5a9cdf32010-06-04 15:47:56 +0800768 /* get per-port change detect bits */
769 if (ehci->has_ppcd)
770 ppcd = status >> 16;
771
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772 while (i--) {
Alek Du5a9cdf32010-06-04 15:47:56 +0800773 int pstatus;
774
775 /* leverage per-port change bits feature */
776 if (ehci->has_ppcd && !(ppcd & (1 << i)))
777 continue;
778 pstatus = ehci_readl(ehci,
779 &ehci->regs->port_status[i]);
David Brownellb972b682006-06-30 02:34:42 -0700780
781 if (pstatus & PORT_OWNER)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 continue;
Alan Sterneafe5b92008-10-06 11:25:53 -0400783 if (!(test_bit(i, &ehci->suspended_ports) &&
784 ((pstatus & PORT_RESUME) ||
785 !(pstatus & PORT_SUSPEND)) &&
786 (pstatus & PORT_PE) &&
787 ehci->reset_done[i] == 0))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788 continue;
789
790 /* start 20 msec resume signaling from this port,
791 * and make khubd collect PORT_STAT_C_SUSPEND to
Alan Stern49d0f072010-01-08 11:18:38 -0500792 * stop that signaling. Use 5 ms extra for safety,
793 * like usb_port_resume() does.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 */
Alan Stern49d0f072010-01-08 11:18:38 -0500795 ehci->reset_done[i] = jiffies + msecs_to_jiffies(25);
Alan Sterna448e4d2012-04-03 15:24:30 -0400796 set_bit(i, &ehci->resuming_ports);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 ehci_dbg (ehci, "port %d remote wakeup\n", i + 1);
Alan Stern61e8b852007-04-09 11:52:31 -0400798 mod_timer(&hcd->rh_timer, ehci->reset_done[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 }
800 }
801
802 /* PCI errors [4.15.2.4] */
803 if (unlikely ((status & STS_FATAL) != 0)) {
Alan Stern67b2e022008-11-12 17:04:53 -0500804 ehci_err(ehci, "fatal error\n");
Alan Sterneafe5b92008-10-06 11:25:53 -0400805 dbg_cmd(ehci, "fatal", cmd);
806 dbg_status(ehci, "fatal", status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807dead:
Alan Stern69fff592011-05-17 17:27:12 -0400808 usb_hc_died(hcd);
Alan Sternbf6387b2012-07-11 11:22:31 -0400809
810 /* Don't let the controller do anything more */
811 ehci->rh_state = EHCI_RH_STOPPING;
812 ehci->command &= ~(CMD_RUN | CMD_ASE | CMD_PSE);
813 ehci_writel(ehci, ehci->command, &ehci->regs->command);
814 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
815 ehci_handle_controller_death(ehci);
816
817 /* Handle completions when the controller stops */
818 bh = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819 }
820
821 if (bh)
David Howells7d12e782006-10-05 14:55:46 +0100822 ehci_work (ehci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823 spin_unlock (&ehci->lock);
David Brownelld1b18422008-03-05 23:37:52 -0800824 if (pcd_status)
Marcelo Tosatti1d619f12007-01-21 19:45:59 -0200825 usb_hcd_poll_rh_status(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 return IRQ_HANDLED;
827}
828
829/*-------------------------------------------------------------------------*/
830
831/*
832 * non-error returns are a promise to giveback() the urb later
833 * we drop ownership so next owner (or urb unlink) can get it
834 *
835 * urb + dev is in hcd.self.controller.urb_list
836 * we're queueing TDs onto software and hardware lists
837 *
838 * hcd-specific init for hcpriv hasn't been done yet
839 *
840 * NOTE: control, bulk, and interrupt share the same code to append TDs
841 * to a (possibly active) QH, and the same QH scanning code.
842 */
843static int ehci_urb_enqueue (
844 struct usb_hcd *hcd,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 struct urb *urb,
Al Viro55016f12005-10-21 03:21:58 -0400846 gfp_t mem_flags
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847) {
848 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
849 struct list_head qtd_list;
850
851 INIT_LIST_HEAD (&qtd_list);
852
853 switch (usb_pipetype (urb->pipe)) {
David Brownell25b70a82008-03-04 15:11:07 -0800854 case PIPE_CONTROL:
855 /* qh_completions() code doesn't handle all the fault cases
856 * in multi-TD control transfers. Even 1KB is rare anyway.
857 */
858 if (urb->transfer_buffer_length > (16 * 1024))
859 return -EMSGSIZE;
860 /* FALLTHROUGH */
861 /* case PIPE_BULK: */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862 default:
863 if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags))
864 return -ENOMEM;
Alan Sterne9df41c2007-08-08 11:48:02 -0400865 return submit_async(ehci, urb, &qtd_list, mem_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866
867 case PIPE_INTERRUPT:
868 if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags))
869 return -ENOMEM;
Alan Sterne9df41c2007-08-08 11:48:02 -0400870 return intr_submit(ehci, urb, &qtd_list, mem_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871
872 case PIPE_ISOCHRONOUS:
873 if (urb->dev->speed == USB_SPEED_HIGH)
874 return itd_submit (ehci, urb, mem_flags);
875 else
876 return sitd_submit (ehci, urb, mem_flags);
877 }
878}
879
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880/* remove from hardware lists
881 * completions normally happen asynchronously
882 */
883
Alan Sterne9df41c2007-08-08 11:48:02 -0400884static int ehci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885{
886 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
887 struct ehci_qh *qh;
888 unsigned long flags;
Alan Sterne9df41c2007-08-08 11:48:02 -0400889 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890
891 spin_lock_irqsave (&ehci->lock, flags);
Alan Sterne9df41c2007-08-08 11:48:02 -0400892 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
893 if (rc)
894 goto done;
895
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 switch (usb_pipetype (urb->pipe)) {
897 // case PIPE_CONTROL:
898 // case PIPE_BULK:
899 default:
900 qh = (struct ehci_qh *) urb->hcpriv;
901 if (!qh)
902 break;
Alan Stern07d29b62007-12-11 16:05:30 -0500903 switch (qh->qh_state) {
904 case QH_STATE_LINKED:
905 case QH_STATE_COMPLETING:
Alan Stern3c273a02012-07-11 11:22:49 -0400906 start_unlink_async(ehci, qh);
Alan Stern07d29b62007-12-11 16:05:30 -0500907 break;
908 case QH_STATE_UNLINK:
909 case QH_STATE_UNLINK_WAIT:
910 /* already started */
911 break;
912 case QH_STATE_IDLE:
Alan Stern7a0f0d92009-07-31 10:40:22 -0400913 /* QH might be waiting for a Clear-TT-Buffer */
914 qh_completions(ehci, qh);
Alan Stern07d29b62007-12-11 16:05:30 -0500915 break;
916 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 break;
918
919 case PIPE_INTERRUPT:
920 qh = (struct ehci_qh *) urb->hcpriv;
921 if (!qh)
922 break;
923 switch (qh->qh_state) {
924 case QH_STATE_LINKED:
Alan Sterna448c9d2009-08-19 12:22:44 -0400925 case QH_STATE_COMPLETING:
Alan Sterndf202252012-07-11 11:22:26 -0400926 start_unlink_intr(ehci, qh);
Alan Sterna448c9d2009-08-19 12:22:44 -0400927 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928 case QH_STATE_IDLE:
David Howells7d12e782006-10-05 14:55:46 +0100929 qh_completions (ehci, qh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930 break;
931 default:
932 ehci_dbg (ehci, "bogus qh %p state %d\n",
933 qh, qh->qh_state);
934 goto done;
935 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936 break;
937
938 case PIPE_ISOCHRONOUS:
939 // itd or sitd ...
940
941 // wait till next completion, do it then.
942 // completion irqs can wait up to 1024 msec,
943 break;
944 }
945done:
946 spin_unlock_irqrestore (&ehci->lock, flags);
Alan Sterne9df41c2007-08-08 11:48:02 -0400947 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948}
949
950/*-------------------------------------------------------------------------*/
951
952// bulk qh holds the data toggle
953
954static void
955ehci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep)
956{
957 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
958 unsigned long flags;
959 struct ehci_qh *qh, *tmp;
960
961 /* ASSERT: any requests/urbs are being unlinked */
962 /* ASSERT: nobody can be submitting urbs for this any more */
963
964rescan:
965 spin_lock_irqsave (&ehci->lock, flags);
966 qh = ep->hcpriv;
967 if (!qh)
968 goto done;
969
970 /* endpoints can be iso streams. for now, we don't
971 * accelerate iso completions ... so spin a while.
972 */
Clemens Ladisch1082f572010-03-01 17:18:56 +0100973 if (qh->hw == NULL) {
Alan Stern8c5bf7b2012-07-11 11:22:39 -0400974 struct ehci_iso_stream *stream = ep->hcpriv;
975
976 if (!list_empty(&stream->td_list))
977 goto idle_timeout;
978
979 /* BUG_ON(!list_empty(&stream->free_list)); */
980 kfree(stream);
981 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982 }
983
Alan Sternc0c53db2012-07-11 11:21:48 -0400984 if (ehci->rh_state < EHCI_RH_RUNNING)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985 qh->qh_state = QH_STATE_IDLE;
986 switch (qh->qh_state) {
987 case QH_STATE_LINKED:
Alan Stern3a444942009-08-19 12:22:06 -0400988 case QH_STATE_COMPLETING:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989 for (tmp = ehci->async->qh_next.qh;
990 tmp && tmp != qh;
991 tmp = tmp->qh_next.qh)
992 continue;
Alan Stern02e2c512010-11-16 10:57:37 -0500993 /* periodic qh self-unlinks on empty, and a COMPLETING qh
994 * may already be unlinked.
995 */
996 if (tmp)
Alan Stern3c273a02012-07-11 11:22:49 -0400997 start_unlink_async(ehci, qh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998 /* FALL THROUGH */
999 case QH_STATE_UNLINK: /* wait for hw to finish? */
Alan Stern07d29b62007-12-11 16:05:30 -05001000 case QH_STATE_UNLINK_WAIT:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001idle_timeout:
1002 spin_unlock_irqrestore (&ehci->lock, flags);
Nishanth Aravamudan22c43862005-08-15 11:30:11 -07001003 schedule_timeout_uninterruptible(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004 goto rescan;
1005 case QH_STATE_IDLE: /* fully unlinked */
Alan Stern914b7012009-06-29 10:47:30 -04001006 if (qh->clearing_tt)
1007 goto idle_timeout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 if (list_empty (&qh->qtd_list)) {
Alan Sternc83e1a92012-07-11 11:21:25 -04001009 qh_destroy(ehci, qh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010 break;
1011 }
1012 /* else FALL THROUGH */
1013 default:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014 /* caller was supposed to have unlinked any requests;
1015 * that's not our job. just leak this memory.
1016 */
1017 ehci_err (ehci, "qh %p (#%02x) state %d%s\n",
1018 qh, ep->desc.bEndpointAddress, qh->qh_state,
1019 list_empty (&qh->qtd_list) ? "" : "(has tds)");
1020 break;
1021 }
Alan Stern8c5bf7b2012-07-11 11:22:39 -04001022 done:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023 ep->hcpriv = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024 spin_unlock_irqrestore (&ehci->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025}
1026
Alan Sternb18ffd42009-05-27 18:21:56 -04001027static void
1028ehci_endpoint_reset(struct usb_hcd *hcd, struct usb_host_endpoint *ep)
1029{
1030 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1031 struct ehci_qh *qh;
1032 int eptype = usb_endpoint_type(&ep->desc);
Alan Sterna455212d2009-06-11 14:56:22 -04001033 int epnum = usb_endpoint_num(&ep->desc);
1034 int is_out = usb_endpoint_dir_out(&ep->desc);
1035 unsigned long flags;
Alan Sternb18ffd42009-05-27 18:21:56 -04001036
1037 if (eptype != USB_ENDPOINT_XFER_BULK && eptype != USB_ENDPOINT_XFER_INT)
1038 return;
1039
Alan Sterna455212d2009-06-11 14:56:22 -04001040 spin_lock_irqsave(&ehci->lock, flags);
Alan Sternb18ffd42009-05-27 18:21:56 -04001041 qh = ep->hcpriv;
1042
1043 /* For Bulk and Interrupt endpoints we maintain the toggle state
1044 * in the hardware; the toggle bits in udev aren't used at all.
1045 * When an endpoint is reset by usb_clear_halt() we must reset
1046 * the toggle bit in the QH.
1047 */
1048 if (qh) {
Alan Sterna455212d2009-06-11 14:56:22 -04001049 usb_settoggle(qh->dev, epnum, is_out, 0);
Alan Sternb18ffd42009-05-27 18:21:56 -04001050 if (!list_empty(&qh->qtd_list)) {
1051 WARN_ONCE(1, "clear_halt for a busy endpoint\n");
Alan Stern3a444942009-08-19 12:22:06 -04001052 } else if (qh->qh_state == QH_STATE_LINKED ||
1053 qh->qh_state == QH_STATE_COMPLETING) {
Alan Sterna455212d2009-06-11 14:56:22 -04001054
1055 /* The toggle value in the QH can't be updated
1056 * while the QH is active. Unlink it now;
1057 * re-linking will call qh_refresh().
Alan Sternb18ffd42009-05-27 18:21:56 -04001058 */
Alan Sterna448c9d2009-08-19 12:22:44 -04001059 if (eptype == USB_ENDPOINT_XFER_BULK)
Alan Stern3c273a02012-07-11 11:22:49 -04001060 start_unlink_async(ehci, qh);
Alan Sterna448c9d2009-08-19 12:22:44 -04001061 else
Alan Sterndf202252012-07-11 11:22:26 -04001062 start_unlink_intr(ehci, qh);
Alan Sternb18ffd42009-05-27 18:21:56 -04001063 }
1064 }
Alan Sterna455212d2009-06-11 14:56:22 -04001065 spin_unlock_irqrestore(&ehci->lock, flags);
Alan Sternb18ffd42009-05-27 18:21:56 -04001066}
1067
Matt Porter7ff71d62005-09-22 22:31:15 -07001068static int ehci_get_frame (struct usb_hcd *hcd)
1069{
1070 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
Alan Stern68aa95d2011-10-12 10:39:14 -04001071 return (ehci_read_frame_index(ehci) >> 3) % ehci->periodic_size;
Matt Porter7ff71d62005-09-22 22:31:15 -07001072}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073
1074/*-------------------------------------------------------------------------*/
Alan Sternc5cf9212012-06-28 11:19:02 -04001075
1076#ifdef CONFIG_PM
1077
1078/* suspend/resume, section 4.3 */
1079
1080/* These routines handle the generic parts of controller suspend/resume */
1081
1082static int __maybe_unused ehci_suspend(struct usb_hcd *hcd, bool do_wakeup)
1083{
1084 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1085
1086 if (time_before(jiffies, ehci->next_statechange))
1087 msleep(10);
1088
1089 /*
1090 * Root hub was already suspended. Disable IRQ emission and
1091 * mark HW unaccessible. The PM and USB cores make sure that
1092 * the root hub is either suspended or stopped.
1093 */
1094 ehci_prepare_ports_for_controller_suspend(ehci, do_wakeup);
1095
1096 spin_lock_irq(&ehci->lock);
1097 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
1098 (void) ehci_readl(ehci, &ehci->regs->intr_enable);
1099
1100 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
1101 spin_unlock_irq(&ehci->lock);
1102
1103 return 0;
1104}
1105
1106/* Returns 0 if power was preserved, 1 if power was lost */
1107static int __maybe_unused ehci_resume(struct usb_hcd *hcd, bool hibernated)
1108{
1109 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1110
1111 if (time_before(jiffies, ehci->next_statechange))
1112 msleep(100);
1113
1114 /* Mark hardware accessible again as we are back to full power by now */
1115 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
1116
1117 /*
1118 * If CF is still set and we aren't resuming from hibernation
1119 * then we maintained suspend power.
1120 * Just undo the effect of ehci_suspend().
1121 */
1122 if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF &&
1123 !hibernated) {
1124 int mask = INTR_MASK;
1125
1126 ehci_prepare_ports_for_controller_resume(ehci);
1127 if (!hcd->self.root_hub->do_remote_wakeup)
1128 mask &= ~STS_PCD;
1129 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
1130 ehci_readl(ehci, &ehci->regs->intr_enable);
1131 return 0;
1132 }
1133
1134 /*
1135 * Else reset, to cope with power loss or resume from hibernation
1136 * having let the firmware kick in during reboot.
1137 */
1138 usb_root_hub_lost_power(hcd->self.root_hub);
1139 (void) ehci_halt(ehci);
1140 (void) ehci_reset(ehci);
1141
Alan Sternc5cf9212012-06-28 11:19:02 -04001142 ehci_writel(ehci, ehci->command, &ehci->regs->command);
1143 ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
1144 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
1145
1146 /* here we "know" root ports should always stay powered */
1147 ehci_port_power(ehci, 1);
1148
1149 ehci->rh_state = EHCI_RH_SUSPENDED;
1150 return 1;
1151}
1152
1153#endif
1154
1155/*-------------------------------------------------------------------------*/
1156
Alexander Shishkineb70e5a2012-05-11 17:25:54 +03001157/*
1158 * The EHCI in ChipIdea HDRC cannot be a separate module or device,
1159 * because its registers (and irq) are shared between host/gadget/otg
1160 * functions and in order to facilitate role switching we cannot
1161 * give the ehci driver exclusive access to those.
1162 */
1163#ifndef CHIPIDEA_EHCI
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164
Alan Stern2b70f072008-10-02 11:47:15 -04001165MODULE_DESCRIPTION(DRIVER_DESC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166MODULE_AUTHOR (DRIVER_AUTHOR);
1167MODULE_LICENSE ("GPL");
1168
Matt Porter7ff71d62005-09-22 22:31:15 -07001169#ifdef CONFIG_PCI
1170#include "ehci-pci.c"
Kumar Gala01cced22006-04-11 10:07:16 -05001171#define PCI_DRIVER ehci_pci_driver
Matt Porter7ff71d62005-09-22 22:31:15 -07001172#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173
Li Yangba029782007-05-11 17:09:55 +08001174#ifdef CONFIG_USB_EHCI_FSL
Randy Vinson80cb9ae2006-01-20 13:53:38 -08001175#include "ehci-fsl.c"
Kumar Gala01cced22006-04-11 10:07:16 -05001176#define PLATFORM_DRIVER ehci_fsl_driver
Randy Vinson80cb9ae2006-01-20 13:53:38 -08001177#endif
1178
Daniel Mack7e8d5cd2009-10-28 01:14:59 +01001179#ifdef CONFIG_USB_EHCI_MXC
1180#include "ehci-mxc.c"
1181#define PLATFORM_DRIVER ehci_mxc_driver
1182#endif
1183
Yoshihiro Shimoda60b0bf02011-03-01 16:58:37 +09001184#ifdef CONFIG_USB_EHCI_SH
Paul Mundt63c84552010-11-01 17:03:27 -04001185#include "ehci-sh.c"
1186#define PLATFORM_DRIVER ehci_hcd_sh_driver
1187#endif
1188
Manuel Lauss3766386032011-08-12 11:39:45 +02001189#ifdef CONFIG_MIPS_ALCHEMY
Jordan Crouse76fa9a22006-01-20 14:06:09 -08001190#include "ehci-au1xxx.c"
Kumar Gala01cced22006-04-11 10:07:16 -05001191#define PLATFORM_DRIVER ehci_hcd_au1xxx_driver
Jordan Crouse76fa9a22006-01-20 14:06:09 -08001192#endif
1193
Keshava Munegowda7f124f42010-11-21 23:23:41 +05301194#ifdef CONFIG_USB_EHCI_HCD_OMAP
Felipe Balbi54ab2b02009-10-14 11:44:14 +03001195#include "ehci-omap.c"
1196#define PLATFORM_DRIVER ehci_hcd_omap_driver
1197#endif
1198
Geoff Levandad75a412007-01-15 20:11:47 -08001199#ifdef CONFIG_PPC_PS3
1200#include "ehci-ps3.c"
Geoff Levand7a4eb7f2007-06-05 20:04:35 -07001201#define PS3_SYSTEM_BUS_DRIVER ps3_ehci_driver
Geoff Levandad75a412007-01-15 20:11:47 -08001202#endif
1203
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001204#ifdef CONFIG_USB_EHCI_HCD_PPC_OF
1205#include "ehci-ppc-of.c"
1206#define OF_PLATFORM_DRIVER ehci_hcd_ppc_of_driver
1207#endif
1208
Julie Zhu08d3c182009-09-21 16:08:19 -06001209#ifdef CONFIG_XPS_USB_HCD_XILINX
1210#include "ehci-xilinx-of.c"
Grant Likely1f23b2d2010-06-02 13:53:17 -06001211#define XILINX_OF_PLATFORM_DRIVER ehci_hcd_xilinx_of_driver
Julie Zhu08d3c182009-09-21 16:08:19 -06001212#endif
1213
Lennert Buytenhek705a7522008-03-27 14:51:40 -04001214#ifdef CONFIG_PLAT_ORION
Tzachi Perelsteine96ffe22007-12-01 11:07:04 -05001215#include "ehci-orion.c"
1216#define PLATFORM_DRIVER ehci_orion_driver
1217#endif
1218
Vladimir Barinov91bc4d32007-12-30 15:21:11 -08001219#ifdef CONFIG_ARCH_IXP4XX
1220#include "ehci-ixp4xx.c"
1221#define PLATFORM_DRIVER ixp4xx_ehci_driver
1222#endif
1223
Wan ZongShun586dfc82009-06-13 09:14:28 +08001224#ifdef CONFIG_USB_W90X900_EHCI
1225#include "ehci-w90x900.c"
1226#define PLATFORM_DRIVER ehci_hcd_w90x900_driver
1227#endif
1228
Nicolas Ferre501c9c02009-07-27 14:47:40 -07001229#ifdef CONFIG_ARCH_AT91
1230#include "ehci-atmel.c"
1231#define PLATFORM_DRIVER ehci_atmel_driver
1232#endif
1233
David Daney1643acc2010-10-08 14:47:52 -07001234#ifdef CONFIG_USB_OCTEON_EHCI
1235#include "ehci-octeon.c"
1236#define PLATFORM_DRIVER ehci_octeon_driver
1237#endif
1238
Mac Lin760efe62010-11-25 23:58:00 +08001239#ifdef CONFIG_USB_CNS3XXX_EHCI
1240#include "ehci-cns3xxx.c"
1241#define PLATFORM_DRIVER cns3xxx_ehci_driver
1242#endif
1243
Alexey Charkovad78aca2010-11-07 19:28:55 +03001244#ifdef CONFIG_ARCH_VT8500
1245#include "ehci-vt8500.c"
1246#define PLATFORM_DRIVER vt8500_ehci_driver
1247#endif
1248
Deepak Sikric8c38de2010-11-10 14:33:18 +05301249#ifdef CONFIG_PLAT_SPEAR
1250#include "ehci-spear.c"
1251#define PLATFORM_DRIVER spear_ehci_hcd_driver
1252#endif
1253
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +05301254#ifdef CONFIG_USB_EHCI_MSM
1255#include "ehci-msm.c"
1256#define PLATFORM_DRIVER ehci_msm_driver
1257#endif
1258
Anoop22ced6872011-02-24 19:26:28 +05301259#ifdef CONFIG_USB_EHCI_HCD_PMC_MSP
1260#include "ehci-pmcmsp.c"
1261#define PLATFORM_DRIVER ehci_hcd_msp_driver
1262#endif
1263
Benoit Goby79ad3b52011-03-09 16:28:56 -08001264#ifdef CONFIG_USB_EHCI_TEGRA
1265#include "ehci-tegra.c"
1266#define PLATFORM_DRIVER tegra_ehci_driver
1267#endif
1268
Joonyoung Shim1bcc5aa2011-04-08 14:08:50 +09001269#ifdef CONFIG_USB_EHCI_S5P
1270#include "ehci-s5p.c"
1271#define PLATFORM_DRIVER s5p_ehci_driver
1272#endif
1273
Jan Andersson9be03922011-05-03 20:11:58 +02001274#ifdef CONFIG_SPARC_LEON
1275#include "ehci-grlib.c"
1276#define PLATFORM_DRIVER ehci_grlib_driver
1277#endif
1278
Jayachandran C3af51542011-11-18 12:12:42 +05301279#ifdef CONFIG_CPU_XLR
Jayachandran C23106342011-08-05 01:28:22 +05301280#include "ehci-xls.c"
1281#define PLATFORM_DRIVER ehci_xls_driver
1282#endif
1283
Neil Zhang3a082ec2011-12-20 13:20:23 +08001284#ifdef CONFIG_USB_EHCI_MV
1285#include "ehci-mv.c"
1286#define PLATFORM_DRIVER ehci_mv_driver
1287#endif
1288
Kelvin Cheungf30cdbc2012-01-18 14:41:16 +08001289#ifdef CONFIG_MACH_LOONGSON1
1290#include "ehci-ls1x.c"
1291#define PLATFORM_DRIVER ehci_ls1x_driver
1292#endif
1293
Steven J. Hillc2566672012-04-19 12:57:31 -05001294#ifdef CONFIG_MIPS_SEAD3
1295#include "ehci-sead3.c"
1296#define PLATFORM_DRIVER ehci_hcd_sead3_driver
1297#endif
1298
Hauke Mehrtens7a7a4a592012-03-13 01:04:48 +01001299#ifdef CONFIG_USB_EHCI_HCD_PLATFORM
1300#include "ehci-platform.c"
1301#define PLATFORM_DRIVER ehci_platform_driver
1302#endif
1303
Geoff Levandad75a412007-01-15 20:11:47 -08001304#if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
Grant Likely1f23b2d2010-06-02 13:53:17 -06001305 !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
1306 !defined(XILINX_OF_PLATFORM_DRIVER)
Matt Porter7ff71d62005-09-22 22:31:15 -07001307#error "missing bus glue for ehci-hcd"
1308#endif
Kumar Gala01cced22006-04-11 10:07:16 -05001309
1310static int __init ehci_hcd_init(void)
1311{
1312 int retval = 0;
1313
Alan Stern2b70f072008-10-02 11:47:15 -04001314 if (usb_disabled())
1315 return -ENODEV;
1316
1317 printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name);
Alan Stern9beeee62008-10-02 11:48:13 -04001318 set_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
1319 if (test_bit(USB_UHCI_LOADED, &usb_hcds_loaded) ||
1320 test_bit(USB_OHCI_LOADED, &usb_hcds_loaded))
1321 printk(KERN_WARNING "Warning! ehci_hcd should always be loaded"
1322 " before uhci_hcd and ohci_hcd, not after\n");
1323
Kumar Gala01cced22006-04-11 10:07:16 -05001324 pr_debug("%s: block sizes: qh %Zd qtd %Zd itd %Zd sitd %Zd\n",
1325 hcd_name,
1326 sizeof(struct ehci_qh), sizeof(struct ehci_qtd),
1327 sizeof(struct ehci_itd), sizeof(struct ehci_sitd));
1328
Tony Jones694cc202007-09-11 14:07:31 -07001329#ifdef DEBUG
Greg Kroah-Hartman08f4e582009-04-24 15:13:18 -07001330 ehci_debug_root = debugfs_create_dir("ehci", usb_debug_root);
Alan Stern9beeee62008-10-02 11:48:13 -04001331 if (!ehci_debug_root) {
1332 retval = -ENOENT;
1333 goto err_debug;
1334 }
Tony Jones694cc202007-09-11 14:07:31 -07001335#endif
1336
Kumar Gala01cced22006-04-11 10:07:16 -05001337#ifdef PLATFORM_DRIVER
1338 retval = platform_driver_register(&PLATFORM_DRIVER);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001339 if (retval < 0)
1340 goto clean0;
Kumar Gala01cced22006-04-11 10:07:16 -05001341#endif
1342
1343#ifdef PCI_DRIVER
1344 retval = pci_register_driver(&PCI_DRIVER);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001345 if (retval < 0)
1346 goto clean1;
Geoff Levandad75a412007-01-15 20:11:47 -08001347#endif
1348
1349#ifdef PS3_SYSTEM_BUS_DRIVER
Geoff Levand7a4eb7f2007-06-05 20:04:35 -07001350 retval = ps3_ehci_driver_register(&PS3_SYSTEM_BUS_DRIVER);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001351 if (retval < 0)
1352 goto clean2;
Kumar Gala01cced22006-04-11 10:07:16 -05001353#endif
1354
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001355#ifdef OF_PLATFORM_DRIVER
Grant Likelyd35fb642011-02-22 21:08:34 -07001356 retval = platform_driver_register(&OF_PLATFORM_DRIVER);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001357 if (retval < 0)
1358 goto clean3;
1359#endif
Grant Likely1f23b2d2010-06-02 13:53:17 -06001360
1361#ifdef XILINX_OF_PLATFORM_DRIVER
Grant Likelyd35fb642011-02-22 21:08:34 -07001362 retval = platform_driver_register(&XILINX_OF_PLATFORM_DRIVER);
Grant Likely1f23b2d2010-06-02 13:53:17 -06001363 if (retval < 0)
1364 goto clean4;
1365#endif
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001366 return retval;
1367
Grant Likely1f23b2d2010-06-02 13:53:17 -06001368#ifdef XILINX_OF_PLATFORM_DRIVER
Grant Likelyd35fb642011-02-22 21:08:34 -07001369 /* platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER); */
Grant Likely1f23b2d2010-06-02 13:53:17 -06001370clean4:
1371#endif
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001372#ifdef OF_PLATFORM_DRIVER
Grant Likelyd35fb642011-02-22 21:08:34 -07001373 platform_driver_unregister(&OF_PLATFORM_DRIVER);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001374clean3:
1375#endif
1376#ifdef PS3_SYSTEM_BUS_DRIVER
1377 ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
1378clean2:
1379#endif
1380#ifdef PCI_DRIVER
1381 pci_unregister_driver(&PCI_DRIVER);
1382clean1:
1383#endif
1384#ifdef PLATFORM_DRIVER
1385 platform_driver_unregister(&PLATFORM_DRIVER);
1386clean0:
1387#endif
1388#ifdef DEBUG
1389 debugfs_remove(ehci_debug_root);
1390 ehci_debug_root = NULL;
Alan Stern9beeee62008-10-02 11:48:13 -04001391err_debug:
Linus Torvaldsa9b61482008-10-20 14:23:29 -07001392#endif
Alan Stern9beeee62008-10-02 11:48:13 -04001393 clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
Kumar Gala01cced22006-04-11 10:07:16 -05001394 return retval;
1395}
1396module_init(ehci_hcd_init);
1397
1398static void __exit ehci_hcd_cleanup(void)
1399{
Grant Likely1f23b2d2010-06-02 13:53:17 -06001400#ifdef XILINX_OF_PLATFORM_DRIVER
Grant Likelyd35fb642011-02-22 21:08:34 -07001401 platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER);
Grant Likely1f23b2d2010-06-02 13:53:17 -06001402#endif
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001403#ifdef OF_PLATFORM_DRIVER
Grant Likelyd35fb642011-02-22 21:08:34 -07001404 platform_driver_unregister(&OF_PLATFORM_DRIVER);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001405#endif
Kumar Gala01cced22006-04-11 10:07:16 -05001406#ifdef PLATFORM_DRIVER
1407 platform_driver_unregister(&PLATFORM_DRIVER);
1408#endif
1409#ifdef PCI_DRIVER
1410 pci_unregister_driver(&PCI_DRIVER);
1411#endif
Geoff Levandad75a412007-01-15 20:11:47 -08001412#ifdef PS3_SYSTEM_BUS_DRIVER
Geoff Levand7a4eb7f2007-06-05 20:04:35 -07001413 ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
Geoff Levandad75a412007-01-15 20:11:47 -08001414#endif
Tony Jones694cc202007-09-11 14:07:31 -07001415#ifdef DEBUG
1416 debugfs_remove(ehci_debug_root);
1417#endif
Alan Stern9beeee62008-10-02 11:48:13 -04001418 clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
Kumar Gala01cced22006-04-11 10:07:16 -05001419}
1420module_exit(ehci_hcd_cleanup);
1421
Alexander Shishkineb70e5a2012-05-11 17:25:54 +03001422#endif /* CHIPIDEA_EHCI */