Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Alan Stern | 578333a | 2011-06-15 16:32:46 -0400 | [diff] [blame] | 2 | * Enhanced Host Controller Interface (EHCI) driver for USB. |
| 3 | * |
| 4 | * Maintainer: Alan Stern <stern@rowland.harvard.edu> |
| 5 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * Copyright (c) 2000-2004 by David Brownell |
David Brownell | 53bd6a6 | 2006-08-30 14:50:06 -0700 | [diff] [blame] | 7 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #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 Lei | 3c04e20 | 2008-09-18 23:06:21 +0800 | [diff] [blame] | 30 | #include <linux/vmalloc.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <linux/errno.h> |
| 32 | #include <linux/init.h> |
Alan Stern | d58b4bc | 2012-07-11 11:21:54 -0400 | [diff] [blame] | 33 | #include <linux/hrtimer.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <linux/list.h> |
| 35 | #include <linux/interrupt.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/usb.h> |
Eric Lescouet | 27729aa | 2010-04-24 23:21:52 +0200 | [diff] [blame] | 37 | #include <linux/usb/hcd.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/moduleparam.h> |
| 39 | #include <linux/dma-mapping.h> |
Tony Jones | 694cc20 | 2007-09-11 14:07:31 -0700 | [diff] [blame] | 40 | #include <linux/debugfs.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 41 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <asm/byteorder.h> |
| 44 | #include <asm/io.h> |
| 45 | #include <asm/irq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #include <asm/unaligned.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
Geoff Levand | df7c1ca | 2011-11-30 16:40:57 -0800 | [diff] [blame] | 48 | #if defined(CONFIG_PPC_PS3) |
| 49 | #include <asm/firmware.h> |
| 50 | #endif |
| 51 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | /*-------------------------------------------------------------------------*/ |
| 53 | |
| 54 | /* |
| 55 | * EHCI hc_driver implementation ... experimental, incomplete. |
| 56 | * Based on the final 1.0 register interface specification. |
| 57 | * |
| 58 | * USB 2.0 shows up in upcoming www.pcmcia.org technology. |
| 59 | * First was PCMCIA, like ISA; then CardBus, which is PCI. |
| 60 | * Next comes "CardBay", using USB 2.0 signals. |
| 61 | * |
| 62 | * Contains additional contributions by Brad Hards, Rory Bolt, and others. |
| 63 | * Special thanks to Intel and VIA for providing host controllers to |
| 64 | * test this driver on, and Cypress (including In-System Design) for |
| 65 | * providing early devices for those host controllers to talk to! |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | */ |
| 67 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | #define DRIVER_AUTHOR "David Brownell" |
| 69 | #define DRIVER_DESC "USB 2.0 'Enhanced' Host Controller (EHCI) Driver" |
| 70 | |
| 71 | static const char hcd_name [] = "ehci_hcd"; |
| 72 | |
| 73 | |
David Brownell | 9776afc | 2008-02-01 11:42:05 -0800 | [diff] [blame] | 74 | #undef VERBOSE_DEBUG |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | #undef EHCI_URB_TRACE |
| 76 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | /* magic numbers that can affect system performance */ |
| 78 | #define EHCI_TUNE_CERR 3 /* 0-3 qtd retries; 0 == don't stop */ |
| 79 | #define EHCI_TUNE_RL_HS 4 /* nak throttle; see 4.9 */ |
| 80 | #define EHCI_TUNE_RL_TT 0 |
| 81 | #define EHCI_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */ |
| 82 | #define EHCI_TUNE_MULT_TT 1 |
Alan Stern | ffda080 | 2010-07-14 11:03:46 -0400 | [diff] [blame] | 83 | /* |
| 84 | * Some drivers think it's safe to schedule isochronous transfers more than |
| 85 | * 256 ms into the future (partly as a result of an old bug in the scheduling |
| 86 | * code). In an attempt to avoid trouble, we will use a minimum scheduling |
| 87 | * length of 512 frames instead of 256. |
| 88 | */ |
| 89 | #define EHCI_TUNE_FLS 1 /* (medium) 512-frame schedule */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | /* Initial IRQ latency: faster than hw default */ |
| 92 | static int log2_irq_thresh = 0; // 0 to 6 |
| 93 | module_param (log2_irq_thresh, int, S_IRUGO); |
| 94 | MODULE_PARM_DESC (log2_irq_thresh, "log2 IRQ latency, 1-64 microframes"); |
| 95 | |
| 96 | /* initial park setting: slower than hw default */ |
| 97 | static unsigned park = 0; |
| 98 | module_param (park, uint, S_IRUGO); |
| 99 | MODULE_PARM_DESC (park, "park setting; 1-3 back-to-back async packets"); |
| 100 | |
David Brownell | 93f1a47 | 2006-11-16 23:34:58 -0800 | [diff] [blame] | 101 | /* for flakey hardware, ignore overcurrent indicators */ |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame] | 102 | static bool ignore_oc = 0; |
David Brownell | 93f1a47 | 2006-11-16 23:34:58 -0800 | [diff] [blame] | 103 | module_param (ignore_oc, bool, S_IRUGO); |
| 104 | MODULE_PARM_DESC (ignore_oc, "ignore bogus hardware overcurrent indications"); |
| 105 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | #define INTR_MASK (STS_IAA | STS_FATAL | STS_PCD | STS_ERR | STS_INT) |
| 107 | |
| 108 | /*-------------------------------------------------------------------------*/ |
| 109 | |
| 110 | #include "ehci.h" |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 111 | #include "pci-quirks.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | |
Alan Stern | acc0850 | 2012-10-10 15:07:39 -0400 | [diff] [blame] | 113 | /* |
| 114 | * The MosChip MCS9990 controller updates its microframe counter |
| 115 | * a little before the frame counter, and occasionally we will read |
| 116 | * the invalid intermediate value. Avoid problems by checking the |
| 117 | * microframe number (the low-order 3 bits); if they are 0 then |
| 118 | * re-read the register to get the correct value. |
| 119 | */ |
| 120 | static unsigned ehci_moschip_read_frame_index(struct ehci_hcd *ehci) |
| 121 | { |
| 122 | unsigned uf; |
| 123 | |
| 124 | uf = ehci_readl(ehci, &ehci->regs->frame_index); |
| 125 | if (unlikely((uf & 7) == 0)) |
| 126 | uf = ehci_readl(ehci, &ehci->regs->frame_index); |
| 127 | return uf; |
| 128 | } |
| 129 | |
| 130 | static inline unsigned ehci_read_frame_index(struct ehci_hcd *ehci) |
| 131 | { |
| 132 | if (ehci->frame_index_bug) |
| 133 | return ehci_moschip_read_frame_index(ehci); |
| 134 | return ehci_readl(ehci, &ehci->regs->frame_index); |
| 135 | } |
| 136 | |
| 137 | #include "ehci-dbg.c" |
| 138 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | /*-------------------------------------------------------------------------*/ |
| 140 | |
| 141 | /* |
| 142 | * handshake - spin reading hc until handshake completes or fails |
| 143 | * @ptr: address of hc register to be read |
| 144 | * @mask: bits to look at in result of read |
| 145 | * @done: value of those bits when handshake succeeds |
| 146 | * @usec: timeout in microseconds |
| 147 | * |
| 148 | * Returns negative errno, or zero on success |
| 149 | * |
| 150 | * Success happens when the "mask" bits have the specified value (hardware |
| 151 | * handshake done). There are two failure modes: "usec" have passed (major |
| 152 | * hardware flakeout), or the register reads as all-ones (hardware removed). |
| 153 | * |
| 154 | * That last failure should_only happen in cases like physical cardbus eject |
| 155 | * before driver shutdown. But it also seems to be caused by bugs in cardbus |
| 156 | * bridge shutdown: shutting down the bridge before the devices using it. |
| 157 | */ |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 158 | static int handshake (struct ehci_hcd *ehci, void __iomem *ptr, |
| 159 | u32 mask, u32 done, int usec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | { |
| 161 | u32 result; |
| 162 | |
| 163 | do { |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 164 | result = ehci_readl(ehci, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | if (result == ~(u32)0) /* card removed */ |
| 166 | return -ENODEV; |
| 167 | result &= mask; |
| 168 | if (result == done) |
| 169 | return 0; |
| 170 | udelay (1); |
| 171 | usec--; |
| 172 | } while (usec > 0); |
| 173 | return -ETIMEDOUT; |
| 174 | } |
| 175 | |
Matthieu CASTET | 65fd427 | 2010-09-06 18:26:56 +0200 | [diff] [blame] | 176 | /* check TDI/ARC silicon is in host mode */ |
| 177 | static int tdi_in_host_mode (struct ehci_hcd *ehci) |
| 178 | { |
Matthieu CASTET | 65fd427 | 2010-09-06 18:26:56 +0200 | [diff] [blame] | 179 | u32 tmp; |
| 180 | |
Alan Stern | a46af4e | 2012-06-25 12:19:03 -0400 | [diff] [blame] | 181 | tmp = ehci_readl(ehci, &ehci->regs->usbmode); |
Matthieu CASTET | 65fd427 | 2010-09-06 18:26:56 +0200 | [diff] [blame] | 182 | return (tmp & 3) == USBMODE_CM_HC; |
| 183 | } |
| 184 | |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 185 | /* |
| 186 | * Force HC to halt state from unknown (EHCI spec section 2.3). |
| 187 | * Must be called with interrupts enabled and the lock not held. |
| 188 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | static int ehci_halt (struct ehci_hcd *ehci) |
| 190 | { |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 191 | u32 temp; |
| 192 | |
| 193 | spin_lock_irq(&ehci->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | |
David Brownell | 72f30b6 | 2005-09-27 10:19:39 -0700 | [diff] [blame] | 195 | /* disable any irqs left enabled by previous code */ |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 196 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); |
David Brownell | 72f30b6 | 2005-09-27 10:19:39 -0700 | [diff] [blame] | 197 | |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 198 | if (ehci_is_TDI(ehci) && !tdi_in_host_mode(ehci)) { |
| 199 | spin_unlock_irq(&ehci->lock); |
Matthieu CASTET | 65fd427 | 2010-09-06 18:26:56 +0200 | [diff] [blame] | 200 | return 0; |
| 201 | } |
| 202 | |
Alan Stern | 3d9545c | 2012-04-23 13:54:36 -0400 | [diff] [blame] | 203 | /* |
| 204 | * This routine gets called during probe before ehci->command |
| 205 | * has been initialized, so we can't rely on its value. |
| 206 | */ |
| 207 | ehci->command &= ~CMD_RUN; |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 208 | temp = ehci_readl(ehci, &ehci->regs->command); |
Alan Stern | 3d9545c | 2012-04-23 13:54:36 -0400 | [diff] [blame] | 209 | temp &= ~(CMD_RUN | CMD_IAAD); |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 210 | ehci_writel(ehci, temp, &ehci->regs->command); |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 211 | |
| 212 | spin_unlock_irq(&ehci->lock); |
| 213 | synchronize_irq(ehci_to_hcd(ehci)->irq); |
| 214 | |
| 215 | return handshake(ehci, &ehci->regs->status, |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 216 | STS_HALT, STS_HALT, 16 * 125); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | } |
| 218 | |
| 219 | /* put TDI/ARC silicon into EHCI mode */ |
| 220 | static void tdi_reset (struct ehci_hcd *ehci) |
| 221 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | u32 tmp; |
| 223 | |
Alan Stern | a46af4e | 2012-06-25 12:19:03 -0400 | [diff] [blame] | 224 | tmp = ehci_readl(ehci, &ehci->regs->usbmode); |
Vladimir Barinov | d23a137 | 2007-05-23 20:07:48 +0400 | [diff] [blame] | 225 | tmp |= USBMODE_CM_HC; |
| 226 | /* The default byte access to MMR space is LE after |
| 227 | * controller reset. Set the required endian mode |
| 228 | * for transfer buffers to match the host microprocessor |
| 229 | */ |
| 230 | if (ehci_big_endian_mmio(ehci)) |
| 231 | tmp |= USBMODE_BE; |
Alan Stern | a46af4e | 2012-06-25 12:19:03 -0400 | [diff] [blame] | 232 | ehci_writel(ehci, tmp, &ehci->regs->usbmode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | } |
| 234 | |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 235 | /* |
| 236 | * Reset a non-running (STS_HALT == 1) controller. |
| 237 | * Must be called with interrupts enabled and the lock not held. |
| 238 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | static int ehci_reset (struct ehci_hcd *ehci) |
| 240 | { |
| 241 | int retval; |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 242 | u32 command = ehci_readl(ehci, &ehci->regs->command); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | |
Jason Wessel | 8d053c7 | 2009-08-20 15:39:54 -0500 | [diff] [blame] | 244 | /* If the EHCI debug controller is active, special care must be |
| 245 | * taken before and after a host controller reset */ |
Jan Beulich | 9fa5780 | 2012-09-18 12:23:02 +0100 | [diff] [blame] | 246 | if (ehci->debug && !dbgp_reset_prep(ehci_to_hcd(ehci))) |
Jason Wessel | 8d053c7 | 2009-08-20 15:39:54 -0500 | [diff] [blame] | 247 | ehci->debug = NULL; |
| 248 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | command |= CMD_RESET; |
| 250 | dbg_cmd (ehci, "reset", command); |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 251 | ehci_writel(ehci, command, &ehci->regs->command); |
Alan Stern | e879990 | 2011-08-18 16:31:30 -0400 | [diff] [blame] | 252 | ehci->rh_state = EHCI_RH_HALTED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | ehci->next_statechange = jiffies; |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 254 | retval = handshake (ehci, &ehci->regs->command, |
| 255 | CMD_RESET, 0, 250 * 1000); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | |
Alek Du | 331ac6b | 2009-07-13 12:41:20 +0800 | [diff] [blame] | 257 | if (ehci->has_hostpc) { |
| 258 | ehci_writel(ehci, USBMODE_EX_HC | USBMODE_EX_VBPS, |
Alan Stern | a46af4e | 2012-06-25 12:19:03 -0400 | [diff] [blame] | 259 | &ehci->regs->usbmode_ex); |
| 260 | ehci_writel(ehci, TXFIFO_DEFAULT, &ehci->regs->txfill_tuning); |
Alek Du | 331ac6b | 2009-07-13 12:41:20 +0800 | [diff] [blame] | 261 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | if (retval) |
| 263 | return retval; |
| 264 | |
| 265 | if (ehci_is_TDI(ehci)) |
| 266 | tdi_reset (ehci); |
| 267 | |
Jason Wessel | 8d053c7 | 2009-08-20 15:39:54 -0500 | [diff] [blame] | 268 | if (ehci->debug) |
Jan Beulich | 9fa5780 | 2012-09-18 12:23:02 +0100 | [diff] [blame] | 269 | dbgp_external_startup(ehci_to_hcd(ehci)); |
Jason Wessel | 8d053c7 | 2009-08-20 15:39:54 -0500 | [diff] [blame] | 270 | |
Alan Stern | a448e4d | 2012-04-03 15:24:30 -0400 | [diff] [blame] | 271 | ehci->port_c_suspend = ehci->suspended_ports = |
| 272 | ehci->resuming_ports = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | return retval; |
| 274 | } |
| 275 | |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 276 | /* |
| 277 | * Idle the controller (turn off the schedules). |
| 278 | * Must be called with interrupts enabled and the lock not held. |
| 279 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | static void ehci_quiesce (struct ehci_hcd *ehci) |
| 281 | { |
| 282 | u32 temp; |
| 283 | |
Alan Stern | e879990 | 2011-08-18 16:31:30 -0400 | [diff] [blame] | 284 | if (ehci->rh_state != EHCI_RH_RUNNING) |
Alan Stern | c0c53db | 2012-07-11 11:21:48 -0400 | [diff] [blame] | 285 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | |
| 287 | /* wait for any schedule enables/disables to take effect */ |
Alan Stern | 3d9545c | 2012-04-23 13:54:36 -0400 | [diff] [blame] | 288 | temp = (ehci->command << 10) & (STS_ASS | STS_PSS); |
Alan Stern | 9671cd7 | 2012-07-11 11:22:16 -0400 | [diff] [blame] | 289 | handshake(ehci, &ehci->regs->status, STS_ASS | STS_PSS, temp, 16 * 125); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | |
| 291 | /* then disable anything that's still active */ |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 292 | spin_lock_irq(&ehci->lock); |
Alan Stern | 3d9545c | 2012-04-23 13:54:36 -0400 | [diff] [blame] | 293 | ehci->command &= ~(CMD_ASE | CMD_PSE); |
| 294 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 295 | spin_unlock_irq(&ehci->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | |
| 297 | /* hardware can take 16 microframes to turn off ... */ |
Alan Stern | 9671cd7 | 2012-07-11 11:22:16 -0400 | [diff] [blame] | 298 | handshake(ehci, &ehci->regs->status, STS_ASS | STS_PSS, 0, 16 * 125); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | } |
| 300 | |
| 301 | /*-------------------------------------------------------------------------*/ |
| 302 | |
Alan Stern | 07d29b6 | 2007-12-11 16:05:30 -0500 | [diff] [blame] | 303 | static void end_unlink_async(struct ehci_hcd *ehci); |
Alan Stern | 32830f2 | 2012-07-11 11:22:53 -0400 | [diff] [blame] | 304 | static void unlink_empty_async(struct ehci_hcd *ehci); |
Alan Stern | 2a40f32 | 2013-03-15 14:40:26 -0400 | [diff] [blame^] | 305 | static void unlink_empty_async_suspended(struct ehci_hcd *ehci); |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 306 | static void ehci_work(struct ehci_hcd *ehci); |
Alan Stern | df20225 | 2012-07-11 11:22:26 -0400 | [diff] [blame] | 307 | static void start_unlink_intr(struct ehci_hcd *ehci, struct ehci_qh *qh); |
| 308 | static void end_unlink_intr(struct ehci_hcd *ehci, struct ehci_qh *qh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | |
Alan Stern | d58b4bc | 2012-07-11 11:21:54 -0400 | [diff] [blame] | 310 | #include "ehci-timer.c" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | #include "ehci-hub.c" |
| 312 | #include "ehci-mem.c" |
| 313 | #include "ehci-q.c" |
| 314 | #include "ehci-sched.c" |
Kirill Smelkov | 4c67045 | 2011-07-03 20:36:56 +0400 | [diff] [blame] | 315 | #include "ehci-sysfs.c" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | |
| 317 | /*-------------------------------------------------------------------------*/ |
| 318 | |
Alan Stern | 8903795 | 2007-02-13 14:55:27 -0500 | [diff] [blame] | 319 | /* On some systems, leaving remote wakeup enabled prevents system shutdown. |
| 320 | * The firmware seems to think that powering off is a wakeup event! |
| 321 | * This routine turns off remote wakeup and everything else, on all ports. |
| 322 | */ |
| 323 | static void ehci_turn_off_all_ports(struct ehci_hcd *ehci) |
| 324 | { |
| 325 | int port = HCS_N_PORTS(ehci->hcs_params); |
| 326 | |
| 327 | while (port--) |
| 328 | ehci_writel(ehci, PORT_RWC_BITS, |
| 329 | &ehci->regs->port_status[port]); |
| 330 | } |
| 331 | |
Sarah Sharp | 21da84a | 2008-04-08 14:30:18 -0700 | [diff] [blame] | 332 | /* |
| 333 | * Halt HC, turn off all ports, and let the BIOS use the companion controllers. |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 334 | * Must be called with interrupts enabled and the lock not held. |
David Brownell | 72f30b6 | 2005-09-27 10:19:39 -0700 | [diff] [blame] | 335 | */ |
Sarah Sharp | 21da84a | 2008-04-08 14:30:18 -0700 | [diff] [blame] | 336 | static void ehci_silence_controller(struct ehci_hcd *ehci) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | { |
Sarah Sharp | 21da84a | 2008-04-08 14:30:18 -0700 | [diff] [blame] | 338 | ehci_halt(ehci); |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 339 | |
| 340 | spin_lock_irq(&ehci->lock); |
| 341 | ehci->rh_state = EHCI_RH_HALTED; |
Alan Stern | 8903795 | 2007-02-13 14:55:27 -0500 | [diff] [blame] | 342 | ehci_turn_off_all_ports(ehci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | |
| 344 | /* make BIOS/etc use companion controller during reboot */ |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 345 | ehci_writel(ehci, 0, &ehci->regs->configured_flag); |
Alan Stern | 8903795 | 2007-02-13 14:55:27 -0500 | [diff] [blame] | 346 | |
| 347 | /* unblock posted writes */ |
| 348 | ehci_readl(ehci, &ehci->regs->configured_flag); |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 349 | spin_unlock_irq(&ehci->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | } |
| 351 | |
Sarah Sharp | 21da84a | 2008-04-08 14:30:18 -0700 | [diff] [blame] | 352 | /* 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 | */ |
| 356 | static void ehci_shutdown(struct usb_hcd *hcd) |
| 357 | { |
| 358 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
| 359 | |
Sarah Sharp | 21da84a | 2008-04-08 14:30:18 -0700 | [diff] [blame] | 360 | spin_lock_irq(&ehci->lock); |
Alan Stern | 43fe3a9 | 2012-07-11 11:23:16 -0400 | [diff] [blame] | 361 | ehci->shutdown = true; |
Alan Stern | c0c53db | 2012-07-11 11:21:48 -0400 | [diff] [blame] | 362 | ehci->rh_state = EHCI_RH_STOPPING; |
Alan Stern | d58b4bc | 2012-07-11 11:21:54 -0400 | [diff] [blame] | 363 | ehci->enabled_hrtimer_events = 0; |
Sarah Sharp | 21da84a | 2008-04-08 14:30:18 -0700 | [diff] [blame] | 364 | spin_unlock_irq(&ehci->lock); |
Alan Stern | d58b4bc | 2012-07-11 11:21:54 -0400 | [diff] [blame] | 365 | |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 366 | ehci_silence_controller(ehci); |
| 367 | |
Alan Stern | d58b4bc | 2012-07-11 11:21:54 -0400 | [diff] [blame] | 368 | hrtimer_cancel(&ehci->hrtimer); |
Sarah Sharp | 21da84a | 2008-04-08 14:30:18 -0700 | [diff] [blame] | 369 | } |
| 370 | |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 371 | /*-------------------------------------------------------------------------*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 373 | /* |
| 374 | * ehci_work is called from some interrupts, timers, and so on. |
| 375 | * it calls driver completion functions, after dropping ehci->lock. |
| 376 | */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 377 | static void ehci_work (struct ehci_hcd *ehci) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | { |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 379 | /* another CPU may drop ehci->lock during a schedule scan while |
| 380 | * it reports urb completions. this flag guards against bogus |
| 381 | * attempts at re-entrant schedule scanning. |
| 382 | */ |
Alan Stern | 361aabf | 2012-07-11 11:22:57 -0400 | [diff] [blame] | 383 | if (ehci->scanning) { |
| 384 | ehci->need_rescan = true; |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 385 | return; |
Alan Stern | 361aabf | 2012-07-11 11:22:57 -0400 | [diff] [blame] | 386 | } |
| 387 | ehci->scanning = true; |
| 388 | |
| 389 | rescan: |
| 390 | ehci->need_rescan = false; |
Alan Stern | 3144661 | 2012-07-11 11:22:21 -0400 | [diff] [blame] | 391 | if (ehci->async_count) |
| 392 | scan_async(ehci); |
Alan Stern | 569b394 | 2012-07-11 11:23:00 -0400 | [diff] [blame] | 393 | if (ehci->intr_count > 0) |
| 394 | scan_intr(ehci); |
| 395 | if (ehci->isoc_count > 0) |
| 396 | scan_isoc(ehci); |
Alan Stern | 361aabf | 2012-07-11 11:22:57 -0400 | [diff] [blame] | 397 | if (ehci->need_rescan) |
| 398 | goto rescan; |
| 399 | ehci->scanning = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 401 | /* the IO watchdog guards against hardware or driver bugs that |
| 402 | * misplace IRQs, and should let us run completely without IRQs. |
| 403 | * such lossage has been observed on both VT6202 and VT8235. |
| 404 | */ |
Alan Stern | 18aafe6 | 2012-07-11 11:23:04 -0400 | [diff] [blame] | 405 | turn_on_io_watchdog(ehci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | } |
| 407 | |
Sarah Sharp | 21da84a | 2008-04-08 14:30:18 -0700 | [diff] [blame] | 408 | /* |
| 409 | * Called when the ehci_hcd module is removed. |
| 410 | */ |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 411 | static void ehci_stop (struct usb_hcd *hcd) |
| 412 | { |
| 413 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
| 414 | |
| 415 | ehci_dbg (ehci, "stop\n"); |
| 416 | |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 417 | /* no more interrupts ... */ |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 418 | |
| 419 | spin_lock_irq(&ehci->lock); |
Alan Stern | d58b4bc | 2012-07-11 11:21:54 -0400 | [diff] [blame] | 420 | ehci->enabled_hrtimer_events = 0; |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 421 | spin_unlock_irq(&ehci->lock); |
| 422 | |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 423 | ehci_quiesce(ehci); |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 424 | ehci_silence_controller(ehci); |
| 425 | ehci_reset (ehci); |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 426 | |
Alan Stern | d58b4bc | 2012-07-11 11:21:54 -0400 | [diff] [blame] | 427 | hrtimer_cancel(&ehci->hrtimer); |
Kirill Smelkov | 4c67045 | 2011-07-03 20:36:56 +0400 | [diff] [blame] | 428 | remove_sysfs_files(ehci); |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 429 | remove_debug_files (ehci); |
| 430 | |
| 431 | /* root hub is shut down separately (first, when possible) */ |
| 432 | spin_lock_irq (&ehci->lock); |
Alan Stern | 55934eb | 2012-07-11 11:22:35 -0400 | [diff] [blame] | 433 | end_free_itds(ehci); |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 434 | spin_unlock_irq (&ehci->lock); |
| 435 | ehci_mem_cleanup (ehci); |
| 436 | |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 437 | if (ehci->amd_pll_fix == 1) |
| 438 | usb_amd_dev_put(); |
Alex He | 0557029 | 2010-12-07 10:10:08 +0800 | [diff] [blame] | 439 | |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 440 | #ifdef EHCI_STATS |
Alan Stern | 99ac5b1 | 2012-07-11 11:21:38 -0400 | [diff] [blame] | 441 | ehci_dbg(ehci, "irq normal %ld err %ld iaa %ld (lost %ld)\n", |
| 442 | ehci->stats.normal, ehci->stats.error, ehci->stats.iaa, |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 443 | ehci->stats.lost_iaa); |
| 444 | ehci_dbg (ehci, "complete %ld unlink %ld\n", |
| 445 | ehci->stats.complete, ehci->stats.unlink); |
| 446 | #endif |
| 447 | |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 448 | dbg_status (ehci, "ehci_stop completed", |
| 449 | ehci_readl(ehci, &ehci->regs->status)); |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 450 | } |
| 451 | |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 452 | /* one-time init, only for memory state */ |
| 453 | static int ehci_init(struct usb_hcd *hcd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | { |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 455 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | u32 temp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | int retval; |
| 458 | u32 hcc_params; |
Alek Du | 3807e26 | 2009-07-14 07:23:29 +0800 | [diff] [blame] | 459 | struct ehci_qh_hw *hw; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 461 | spin_lock_init(&ehci->lock); |
| 462 | |
Alek Du | 403dbd3 | 2009-07-13 17:30:41 +0800 | [diff] [blame] | 463 | /* |
| 464 | * keep io watchdog by default, those good HCDs could turn off it later |
| 465 | */ |
| 466 | ehci->need_io_watchdog = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | |
Alan Stern | d58b4bc | 2012-07-11 11:21:54 -0400 | [diff] [blame] | 468 | hrtimer_init(&ehci->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); |
| 469 | ehci->hrtimer.function = ehci_hrtimer_func; |
| 470 | ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT; |
Alan Stern | 07d29b6 | 2007-12-11 16:05:30 -0500 | [diff] [blame] | 471 | |
Alan Stern | f75593c | 2011-01-06 10:17:09 -0500 | [diff] [blame] | 472 | hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params); |
| 473 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | /* |
Kirill Smelkov | cc62a7e | 2011-07-03 20:36:57 +0400 | [diff] [blame] | 475 | * by default set standard 80% (== 100 usec/uframe) max periodic |
| 476 | * bandwidth as required by USB 2.0 |
| 477 | */ |
| 478 | ehci->uframe_periodic_max = 100; |
| 479 | |
| 480 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | * hw default: 1K periodic list heads, one per frame. |
| 482 | * periodic_size can shrink by USBCMD update if hcc_params allows. |
| 483 | */ |
| 484 | ehci->periodic_size = DEFAULT_I_TDPS; |
Alan Stern | 569b394 | 2012-07-11 11:23:00 -0400 | [diff] [blame] | 485 | INIT_LIST_HEAD(&ehci->intr_qh_list); |
Karsten Wiese | 9aa09d2 | 2009-02-08 16:07:58 -0800 | [diff] [blame] | 486 | INIT_LIST_HEAD(&ehci->cached_itd_list); |
Alan Stern | 0e5f231 | 2010-04-08 16:56:37 -0400 | [diff] [blame] | 487 | INIT_LIST_HEAD(&ehci->cached_sitd_list); |
Alan Stern | f75593c | 2011-01-06 10:17:09 -0500 | [diff] [blame] | 488 | |
Greg Kroah-Hartman | 8e19291 | 2012-05-21 08:54:43 -0700 | [diff] [blame] | 489 | if (HCC_PGM_FRAMELISTLEN(hcc_params)) { |
Alan Stern | f75593c | 2011-01-06 10:17:09 -0500 | [diff] [blame] | 490 | /* periodic schedule size can be smaller than default */ |
| 491 | switch (EHCI_TUNE_FLS) { |
| 492 | case 0: ehci->periodic_size = 1024; break; |
| 493 | case 1: ehci->periodic_size = 512; break; |
| 494 | case 2: ehci->periodic_size = 256; break; |
| 495 | default: BUG(); |
| 496 | } |
| 497 | } |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 498 | if ((retval = ehci_mem_init(ehci, GFP_KERNEL)) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | return retval; |
| 500 | |
| 501 | /* controllers may cache some of the periodic schedule ... */ |
David Brownell | 53bd6a6 | 2006-08-30 14:50:06 -0700 | [diff] [blame] | 502 | if (HCC_ISOC_CACHE(hcc_params)) // full frame cache |
Alan Stern | 98cae42 | 2012-09-28 16:01:34 -0400 | [diff] [blame] | 503 | ehci->i_thresh = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | else // N microframes cached |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 505 | ehci->i_thresh = 2 + HCC_ISOC_THRES(hcc_params); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | /* |
| 508 | * dedicate a qh for the async ring head, since we couldn't unlink |
| 509 | * a 'real' qh without stopping the async schedule [4.8]. use it |
| 510 | * as the 'reclamation list head' too. |
| 511 | * its dummy is used in hw_alt_next of many tds, to prevent the qh |
| 512 | * from automatically advancing to the next td after short reads. |
| 513 | */ |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 514 | ehci->async->qh_next.qh = NULL; |
Alek Du | 3807e26 | 2009-07-14 07:23:29 +0800 | [diff] [blame] | 515 | hw = ehci->async->hw; |
| 516 | hw->hw_next = QH_NEXT(ehci, ehci->async->qh_dma); |
| 517 | hw->hw_info1 = cpu_to_hc32(ehci, QH_HEAD); |
Ricardo Martins | 4f7a67e | 2012-05-22 18:02:03 +0100 | [diff] [blame] | 518 | #if defined(CONFIG_PPC_PS3) |
Alan Stern | 4c53de7 | 2012-07-11 11:21:32 -0400 | [diff] [blame] | 519 | hw->hw_info1 |= cpu_to_hc32(ehci, QH_INACTIVATE); |
Ricardo Martins | 4f7a67e | 2012-05-22 18:02:03 +0100 | [diff] [blame] | 520 | #endif |
Alek Du | 3807e26 | 2009-07-14 07:23:29 +0800 | [diff] [blame] | 521 | hw->hw_token = cpu_to_hc32(ehci, QTD_STS_HALT); |
| 522 | hw->hw_qtd_next = EHCI_LIST_END(ehci); |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 523 | ehci->async->qh_state = QH_STATE_LINKED; |
Alek Du | 3807e26 | 2009-07-14 07:23:29 +0800 | [diff] [blame] | 524 | hw->hw_alt_next = QTD_NEXT(ehci, ehci->async->dummy->qtd_dma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | |
| 526 | /* clear interrupt enables, set irq latency */ |
| 527 | if (log2_irq_thresh < 0 || log2_irq_thresh > 6) |
| 528 | log2_irq_thresh = 0; |
| 529 | temp = 1 << (16 + log2_irq_thresh); |
Alek Du | 5a9cdf3 | 2010-06-04 15:47:56 +0800 | [diff] [blame] | 530 | if (HCC_PER_PORT_CHANGE_EVENT(hcc_params)) { |
| 531 | ehci->has_ppcd = 1; |
| 532 | ehci_dbg(ehci, "enable per-port change event\n"); |
| 533 | temp |= CMD_PPCEE; |
| 534 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | if (HCC_CANPARK(hcc_params)) { |
| 536 | /* HW default park == 3, on hardware that supports it (like |
| 537 | * NVidia and ALI silicon), maximizes throughput on the async |
| 538 | * schedule by avoiding QH fetches between transfers. |
| 539 | * |
| 540 | * With fast usb storage devices and NForce2, "park" seems to |
| 541 | * make problems: throughput reduction (!), data errors... |
| 542 | */ |
| 543 | if (park) { |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 544 | park = min(park, (unsigned) 3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | temp |= CMD_PARK; |
| 546 | temp |= park << 8; |
| 547 | } |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 548 | ehci_dbg(ehci, "park %d\n", park); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | } |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 550 | if (HCC_PGM_FRAMELISTLEN(hcc_params)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | /* periodic schedule size can be smaller than default */ |
| 552 | temp &= ~(3 << 2); |
| 553 | temp |= (EHCI_TUNE_FLS << 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | } |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 555 | ehci->command = temp; |
| 556 | |
Alan Stern | 40f8db8 | 2009-11-06 12:29:40 -0500 | [diff] [blame] | 557 | /* Accept arbitrarily long scatter-gather lists */ |
Andrea Righi | 4307a28 | 2010-06-28 16:56:45 +0200 | [diff] [blame] | 558 | if (!(hcd->driver->flags & HCD_LOCAL_MEM)) |
| 559 | hcd->self.sg_tablesize = ~0; |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 560 | return 0; |
| 561 | } |
| 562 | |
| 563 | /* start HC running; it's halted, ehci_init() has been run (once) */ |
| 564 | static int ehci_run (struct usb_hcd *hcd) |
| 565 | { |
| 566 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 567 | u32 temp; |
| 568 | u32 hcc_params; |
| 569 | |
Marcelo Tosatti | 1d619f1 | 2007-01-21 19:45:59 -0200 | [diff] [blame] | 570 | hcd->uses_new_polling = 1; |
Marcelo Tosatti | 1d619f1 | 2007-01-21 19:45:59 -0200 | [diff] [blame] | 571 | |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 572 | /* EHCI spec section 4.1 */ |
Geoff Levand | 876e0df | 2011-11-22 18:04:45 -0800 | [diff] [blame] | 573 | |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 574 | ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); |
| 575 | ehci_writel(ehci, (u32)ehci->async->qh_dma, &ehci->regs->async_next); |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 576 | |
| 577 | /* |
| 578 | * hcc_params controls whether ehci->regs->segment must (!!!) |
| 579 | * be used; it constrains QH/ITD/SITD and QTD locations. |
| 580 | * pci_pool consistent memory always uses segment zero. |
| 581 | * streaming mappings for I/O buffers, like pci_map_single(), |
| 582 | * can return segments above 4GB, if the device allows. |
| 583 | * |
| 584 | * NOTE: the dma mask is visible through dma_supported(), so |
| 585 | * drivers can pass this info along ... like NETIF_F_HIGHDMA, |
| 586 | * Scsi_Host.highmem_io, and so forth. It's readonly to all |
| 587 | * host side drivers though. |
| 588 | */ |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 589 | hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params); |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 590 | if (HCC_64BIT_ADDR(hcc_params)) { |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 591 | ehci_writel(ehci, 0, &ehci->regs->segment); |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 592 | #if 0 |
| 593 | // this is deeply broken on almost all architectures |
Yang Hongyang | 6a35528 | 2009-04-06 19:01:13 -0700 | [diff] [blame] | 594 | if (!dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64))) |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 595 | ehci_info(ehci, "enabled 64bit DMA\n"); |
| 596 | #endif |
| 597 | } |
| 598 | |
| 599 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | // Philips, Intel, and maybe others need CMD_RUN before the |
| 601 | // root hub will detect new devices (why?); NEC doesn't |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 602 | ehci->command &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET); |
| 603 | ehci->command |= CMD_RUN; |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 604 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 605 | dbg_cmd (ehci, "init", ehci->command); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | /* |
| 608 | * Start, enabling full USB 2.0 functionality ... usb 1.1 devices |
| 609 | * are explicitly handed to companion controller(s), so no TT is |
| 610 | * involved with the root hub. (Except where one is integrated, |
| 611 | * and there's no companion controller unless maybe for USB OTG.) |
Alan Stern | 32fe019 | 2007-10-10 16:27:07 -0400 | [diff] [blame] | 612 | * |
| 613 | * Turning on the CF flag will transfer ownership of all ports |
| 614 | * from the companions to the EHCI controller. If any of the |
| 615 | * companions are in the middle of a port reset at the time, it |
| 616 | * could cause trouble. Write-locking ehci_cf_port_reset_rwsem |
David Brownell | 1cb5265 | 2007-11-13 16:22:30 -0800 | [diff] [blame] | 617 | * guarantees that no resets are in progress. After we set CF, |
| 618 | * a short delay lets the hardware catch up; new resets shouldn't |
| 619 | * be started before the port switching actions could complete. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | */ |
Alan Stern | 32fe019 | 2007-10-10 16:27:07 -0400 | [diff] [blame] | 621 | down_write(&ehci_cf_port_reset_rwsem); |
Alan Stern | e879990 | 2011-08-18 16:31:30 -0400 | [diff] [blame] | 622 | ehci->rh_state = EHCI_RH_RUNNING; |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 623 | ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag); |
| 624 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ |
David Brownell | 1cb5265 | 2007-11-13 16:22:30 -0800 | [diff] [blame] | 625 | msleep(5); |
Alan Stern | 32fe019 | 2007-10-10 16:27:07 -0400 | [diff] [blame] | 626 | up_write(&ehci_cf_port_reset_rwsem); |
Oliver Neukum | ee4ecb8 | 2009-11-27 15:17:59 +0100 | [diff] [blame] | 627 | ehci->last_periodic_enable = ktime_get_real(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | |
Jan Andersson | c430131 | 2011-05-03 20:11:57 +0200 | [diff] [blame] | 629 | temp = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | ehci_info (ehci, |
Alan Stern | 2b70f07 | 2008-10-02 11:47:15 -0400 | [diff] [blame] | 631 | "USB %x.%x started, EHCI %x.%02x%s\n", |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 632 | ((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f), |
Alan Stern | 2b70f07 | 2008-10-02 11:47:15 -0400 | [diff] [blame] | 633 | temp >> 8, temp & 0xff, |
David Brownell | 93f1a47 | 2006-11-16 23:34:58 -0800 | [diff] [blame] | 634 | ignore_oc ? ", overcurrent ignored" : ""); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 636 | ehci_writel(ehci, INTR_MASK, |
| 637 | &ehci->regs->intr_enable); /* Turn On Interrupts */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 639 | /* GRR this is run-once init(), being done every time the HC starts. |
| 640 | * So long as they're part of class devices, we can't do it init() |
| 641 | * since the class device isn't created that early. |
| 642 | */ |
| 643 | create_debug_files(ehci); |
Kirill Smelkov | 4c67045 | 2011-07-03 20:36:56 +0400 | [diff] [blame] | 644 | create_sysfs_files(ehci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | |
| 646 | return 0; |
| 647 | } |
| 648 | |
Alan Stern | 3e02320 | 2012-11-01 11:12:58 -0400 | [diff] [blame] | 649 | int ehci_setup(struct usb_hcd *hcd) |
Matthieu CASTET | 2093c6b | 2011-07-02 19:47:33 +0200 | [diff] [blame] | 650 | { |
| 651 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
| 652 | int retval; |
| 653 | |
| 654 | ehci->regs = (void __iomem *)ehci->caps + |
| 655 | HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)); |
| 656 | dbg_hcs_params(ehci, "reset"); |
| 657 | dbg_hcc_params(ehci, "reset"); |
| 658 | |
| 659 | /* cache this readonly data; minimize chip reads */ |
| 660 | ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); |
| 661 | |
| 662 | ehci->sbrn = HCD_USB2; |
| 663 | |
Matthieu CASTET | 2093c6b | 2011-07-02 19:47:33 +0200 | [diff] [blame] | 664 | /* data structure init */ |
| 665 | retval = ehci_init(hcd); |
| 666 | if (retval) |
| 667 | return retval; |
| 668 | |
Alan Stern | 631fe9d | 2012-07-11 11:21:09 -0400 | [diff] [blame] | 669 | retval = ehci_halt(ehci); |
Matthieu CASTET | 2093c6b | 2011-07-02 19:47:33 +0200 | [diff] [blame] | 670 | if (retval) |
| 671 | return retval; |
| 672 | |
Alan Stern | 1a49e2a | 2012-07-09 15:55:14 -0400 | [diff] [blame] | 673 | if (ehci_is_TDI(ehci)) |
| 674 | tdi_reset(ehci); |
| 675 | |
Matthieu CASTET | 2093c6b | 2011-07-02 19:47:33 +0200 | [diff] [blame] | 676 | ehci_reset(ehci); |
| 677 | |
| 678 | return 0; |
| 679 | } |
Alan Stern | 3e02320 | 2012-11-01 11:12:58 -0400 | [diff] [blame] | 680 | EXPORT_SYMBOL_GPL(ehci_setup); |
Matthieu CASTET | 2093c6b | 2011-07-02 19:47:33 +0200 | [diff] [blame] | 681 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | /*-------------------------------------------------------------------------*/ |
| 683 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 684 | static irqreturn_t ehci_irq (struct usb_hcd *hcd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | { |
| 686 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
Alan Stern | 67b2e02 | 2008-11-12 17:04:53 -0500 | [diff] [blame] | 687 | u32 status, masked_status, pcd_status = 0, cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | int bh; |
| 689 | |
| 690 | spin_lock (&ehci->lock); |
| 691 | |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 692 | status = ehci_readl(ehci, &ehci->regs->status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | |
| 694 | /* e.g. cardbus physical eject */ |
| 695 | if (status == ~(u32) 0) { |
| 696 | ehci_dbg (ehci, "device removed\n"); |
| 697 | goto dead; |
| 698 | } |
| 699 | |
Alan Stern | 2fbe2bf | 2012-04-18 11:33:00 -0400 | [diff] [blame] | 700 | /* |
| 701 | * We don't use STS_FLR, but some controllers don't like it to |
| 702 | * remain on, so mask it out along with the other status bits. |
| 703 | */ |
| 704 | masked_status = status & (INTR_MASK | STS_FLR); |
| 705 | |
Alan Stern | 69fff59 | 2011-05-17 17:27:12 -0400 | [diff] [blame] | 706 | /* Shared IRQ? */ |
Alan Stern | e879990 | 2011-08-18 16:31:30 -0400 | [diff] [blame] | 707 | if (!masked_status || unlikely(ehci->rh_state == EHCI_RH_HALTED)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | spin_unlock(&ehci->lock); |
| 709 | return IRQ_NONE; |
| 710 | } |
| 711 | |
| 712 | /* clear (just) interrupts */ |
Alan Stern | 67b2e02 | 2008-11-12 17:04:53 -0500 | [diff] [blame] | 713 | ehci_writel(ehci, masked_status, &ehci->regs->status); |
David Brownell | e82cc12 | 2008-03-07 13:49:42 -0800 | [diff] [blame] | 714 | cmd = ehci_readl(ehci, &ehci->regs->command); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | bh = 0; |
| 716 | |
David Brownell | 9776afc | 2008-02-01 11:42:05 -0800 | [diff] [blame] | 717 | #ifdef VERBOSE_DEBUG |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | /* unrequested/ignored: Frame List Rollover */ |
| 719 | dbg_status (ehci, "irq", status); |
| 720 | #endif |
| 721 | |
| 722 | /* INT, ERR, and IAA interrupt rates can be throttled */ |
| 723 | |
| 724 | /* normal [4.15.1.2] or error [4.15.1.1] completion */ |
| 725 | if (likely ((status & (STS_INT|STS_ERR)) != 0)) { |
| 726 | if (likely ((status & STS_ERR) == 0)) |
| 727 | COUNT (ehci->stats.normal); |
| 728 | else |
| 729 | COUNT (ehci->stats.error); |
| 730 | bh = 1; |
| 731 | } |
| 732 | |
| 733 | /* complete the unlinking of some qh [4.15.2.3] */ |
| 734 | if (status & STS_IAA) { |
Alan Stern | 9d93874 | 2012-07-11 11:22:44 -0400 | [diff] [blame] | 735 | |
| 736 | /* Turn off the IAA watchdog */ |
| 737 | ehci->enabled_hrtimer_events &= ~BIT(EHCI_HRTIMER_IAA_WATCHDOG); |
| 738 | |
| 739 | /* |
| 740 | * Mild optimization: Allow another IAAD to reset the |
| 741 | * hrtimer, if one occurs before the next expiration. |
| 742 | * In theory we could always cancel the hrtimer, but |
| 743 | * tests show that about half the time it will be reset |
| 744 | * for some other event anyway. |
| 745 | */ |
| 746 | if (ehci->next_hrtimer_event == EHCI_HRTIMER_IAA_WATCHDOG) |
| 747 | ++ehci->next_hrtimer_event; |
| 748 | |
David Brownell | e82cc12 | 2008-03-07 13:49:42 -0800 | [diff] [blame] | 749 | /* guard against (alleged) silicon errata */ |
Alan Stern | 6feff1b | 2012-04-17 15:23:25 -0400 | [diff] [blame] | 750 | if (cmd & CMD_IAAD) |
David Brownell | e82cc12 | 2008-03-07 13:49:42 -0800 | [diff] [blame] | 751 | ehci_dbg(ehci, "IAA with IAAD still set?\n"); |
Alan Stern | 6402c79 | 2013-03-01 10:50:08 -0500 | [diff] [blame] | 752 | if (ehci->async_iaa) |
Alan Stern | 99ac5b1 | 2012-07-11 11:21:38 -0400 | [diff] [blame] | 753 | COUNT(ehci->stats.iaa); |
Alan Stern | 6402c79 | 2013-03-01 10:50:08 -0500 | [diff] [blame] | 754 | end_unlink_async(ehci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | } |
| 756 | |
| 757 | /* remote wakeup [4.3.1] */ |
David Brownell | d97cc2f | 2005-12-22 17:05:18 -0800 | [diff] [blame] | 758 | if (status & STS_PCD) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | unsigned i = HCS_N_PORTS (ehci->hcs_params); |
Alek Du | 5a9cdf3 | 2010-06-04 15:47:56 +0800 | [diff] [blame] | 760 | u32 ppcd = 0; |
David Brownell | d1b1842 | 2008-03-05 23:37:52 -0800 | [diff] [blame] | 761 | |
| 762 | /* kick root hub later */ |
Marcelo Tosatti | 1d619f1 | 2007-01-21 19:45:59 -0200 | [diff] [blame] | 763 | pcd_status = status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | |
| 765 | /* resume root hub? */ |
Alan Stern | dc75ce9 | 2012-04-17 15:24:15 -0400 | [diff] [blame] | 766 | if (ehci->rh_state == EHCI_RH_SUSPENDED) |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 767 | usb_hcd_resume_root_hub(hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | |
Alek Du | 5a9cdf3 | 2010-06-04 15:47:56 +0800 | [diff] [blame] | 769 | /* get per-port change detect bits */ |
| 770 | if (ehci->has_ppcd) |
| 771 | ppcd = status >> 16; |
| 772 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | while (i--) { |
Alek Du | 5a9cdf3 | 2010-06-04 15:47:56 +0800 | [diff] [blame] | 774 | int pstatus; |
| 775 | |
| 776 | /* leverage per-port change bits feature */ |
| 777 | if (ehci->has_ppcd && !(ppcd & (1 << i))) |
| 778 | continue; |
| 779 | pstatus = ehci_readl(ehci, |
| 780 | &ehci->regs->port_status[i]); |
David Brownell | b972b68 | 2006-06-30 02:34:42 -0700 | [diff] [blame] | 781 | |
| 782 | if (pstatus & PORT_OWNER) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | continue; |
Alan Stern | eafe5b9 | 2008-10-06 11:25:53 -0400 | [diff] [blame] | 784 | if (!(test_bit(i, &ehci->suspended_ports) && |
| 785 | ((pstatus & PORT_RESUME) || |
| 786 | !(pstatus & PORT_SUSPEND)) && |
| 787 | (pstatus & PORT_PE) && |
| 788 | ehci->reset_done[i] == 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | continue; |
| 790 | |
| 791 | /* start 20 msec resume signaling from this port, |
| 792 | * and make khubd collect PORT_STAT_C_SUSPEND to |
Alan Stern | 49d0f07 | 2010-01-08 11:18:38 -0500 | [diff] [blame] | 793 | * stop that signaling. Use 5 ms extra for safety, |
| 794 | * like usb_port_resume() does. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | */ |
Alan Stern | 49d0f07 | 2010-01-08 11:18:38 -0500 | [diff] [blame] | 796 | ehci->reset_done[i] = jiffies + msecs_to_jiffies(25); |
Alan Stern | a448e4d | 2012-04-03 15:24:30 -0400 | [diff] [blame] | 797 | set_bit(i, &ehci->resuming_ports); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | ehci_dbg (ehci, "port %d remote wakeup\n", i + 1); |
Alan Stern | f292e7f | 2013-01-25 17:09:49 -0500 | [diff] [blame] | 799 | usb_hcd_start_port_resume(&hcd->self, i); |
Alan Stern | 61e8b85 | 2007-04-09 11:52:31 -0400 | [diff] [blame] | 800 | mod_timer(&hcd->rh_timer, ehci->reset_done[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | } |
| 802 | } |
| 803 | |
| 804 | /* PCI errors [4.15.2.4] */ |
| 805 | if (unlikely ((status & STS_FATAL) != 0)) { |
Alan Stern | 67b2e02 | 2008-11-12 17:04:53 -0500 | [diff] [blame] | 806 | ehci_err(ehci, "fatal error\n"); |
Alan Stern | eafe5b9 | 2008-10-06 11:25:53 -0400 | [diff] [blame] | 807 | dbg_cmd(ehci, "fatal", cmd); |
| 808 | dbg_status(ehci, "fatal", status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | dead: |
Alan Stern | 69fff59 | 2011-05-17 17:27:12 -0400 | [diff] [blame] | 810 | usb_hc_died(hcd); |
Alan Stern | bf6387b | 2012-07-11 11:22:31 -0400 | [diff] [blame] | 811 | |
| 812 | /* Don't let the controller do anything more */ |
Alan Stern | 43fe3a9 | 2012-07-11 11:23:16 -0400 | [diff] [blame] | 813 | ehci->shutdown = true; |
Alan Stern | bf6387b | 2012-07-11 11:22:31 -0400 | [diff] [blame] | 814 | ehci->rh_state = EHCI_RH_STOPPING; |
| 815 | ehci->command &= ~(CMD_RUN | CMD_ASE | CMD_PSE); |
| 816 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
| 817 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); |
| 818 | ehci_handle_controller_death(ehci); |
| 819 | |
| 820 | /* Handle completions when the controller stops */ |
| 821 | bh = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | } |
| 823 | |
| 824 | if (bh) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 825 | ehci_work (ehci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | spin_unlock (&ehci->lock); |
David Brownell | d1b1842 | 2008-03-05 23:37:52 -0800 | [diff] [blame] | 827 | if (pcd_status) |
Marcelo Tosatti | 1d619f1 | 2007-01-21 19:45:59 -0200 | [diff] [blame] | 828 | usb_hcd_poll_rh_status(hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | return IRQ_HANDLED; |
| 830 | } |
| 831 | |
| 832 | /*-------------------------------------------------------------------------*/ |
| 833 | |
| 834 | /* |
| 835 | * non-error returns are a promise to giveback() the urb later |
| 836 | * we drop ownership so next owner (or urb unlink) can get it |
| 837 | * |
| 838 | * urb + dev is in hcd.self.controller.urb_list |
| 839 | * we're queueing TDs onto software and hardware lists |
| 840 | * |
| 841 | * hcd-specific init for hcpriv hasn't been done yet |
| 842 | * |
| 843 | * NOTE: control, bulk, and interrupt share the same code to append TDs |
| 844 | * to a (possibly active) QH, and the same QH scanning code. |
| 845 | */ |
| 846 | static int ehci_urb_enqueue ( |
| 847 | struct usb_hcd *hcd, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | struct urb *urb, |
Al Viro | 55016f1 | 2005-10-21 03:21:58 -0400 | [diff] [blame] | 849 | gfp_t mem_flags |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | ) { |
| 851 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
| 852 | struct list_head qtd_list; |
| 853 | |
| 854 | INIT_LIST_HEAD (&qtd_list); |
| 855 | |
| 856 | switch (usb_pipetype (urb->pipe)) { |
David Brownell | 25b70a8 | 2008-03-04 15:11:07 -0800 | [diff] [blame] | 857 | case PIPE_CONTROL: |
| 858 | /* qh_completions() code doesn't handle all the fault cases |
| 859 | * in multi-TD control transfers. Even 1KB is rare anyway. |
| 860 | */ |
| 861 | if (urb->transfer_buffer_length > (16 * 1024)) |
| 862 | return -EMSGSIZE; |
| 863 | /* FALLTHROUGH */ |
| 864 | /* case PIPE_BULK: */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | default: |
| 866 | if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags)) |
| 867 | return -ENOMEM; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 868 | return submit_async(ehci, urb, &qtd_list, mem_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | |
| 870 | case PIPE_INTERRUPT: |
| 871 | if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags)) |
| 872 | return -ENOMEM; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 873 | return intr_submit(ehci, urb, &qtd_list, mem_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | |
| 875 | case PIPE_ISOCHRONOUS: |
| 876 | if (urb->dev->speed == USB_SPEED_HIGH) |
| 877 | return itd_submit (ehci, urb, mem_flags); |
| 878 | else |
| 879 | return sitd_submit (ehci, urb, mem_flags); |
| 880 | } |
| 881 | } |
| 882 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | /* remove from hardware lists |
| 884 | * completions normally happen asynchronously |
| 885 | */ |
| 886 | |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 887 | static int ehci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | { |
| 889 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
| 890 | struct ehci_qh *qh; |
| 891 | unsigned long flags; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 892 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | |
| 894 | spin_lock_irqsave (&ehci->lock, flags); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 895 | rc = usb_hcd_check_unlink_urb(hcd, urb, status); |
| 896 | if (rc) |
| 897 | goto done; |
| 898 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | switch (usb_pipetype (urb->pipe)) { |
| 900 | // case PIPE_CONTROL: |
| 901 | // case PIPE_BULK: |
| 902 | default: |
| 903 | qh = (struct ehci_qh *) urb->hcpriv; |
| 904 | if (!qh) |
| 905 | break; |
Alan Stern | 07d29b6 | 2007-12-11 16:05:30 -0500 | [diff] [blame] | 906 | switch (qh->qh_state) { |
| 907 | case QH_STATE_LINKED: |
| 908 | case QH_STATE_COMPLETING: |
Alan Stern | 3c273a0 | 2012-07-11 11:22:49 -0400 | [diff] [blame] | 909 | start_unlink_async(ehci, qh); |
Alan Stern | 07d29b6 | 2007-12-11 16:05:30 -0500 | [diff] [blame] | 910 | break; |
| 911 | case QH_STATE_UNLINK: |
| 912 | case QH_STATE_UNLINK_WAIT: |
| 913 | /* already started */ |
| 914 | break; |
| 915 | case QH_STATE_IDLE: |
Alan Stern | 7a0f0d9 | 2009-07-31 10:40:22 -0400 | [diff] [blame] | 916 | /* QH might be waiting for a Clear-TT-Buffer */ |
| 917 | qh_completions(ehci, qh); |
Alan Stern | 07d29b6 | 2007-12-11 16:05:30 -0500 | [diff] [blame] | 918 | break; |
| 919 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | break; |
| 921 | |
| 922 | case PIPE_INTERRUPT: |
| 923 | qh = (struct ehci_qh *) urb->hcpriv; |
| 924 | if (!qh) |
| 925 | break; |
| 926 | switch (qh->qh_state) { |
| 927 | case QH_STATE_LINKED: |
Alan Stern | a448c9d | 2009-08-19 12:22:44 -0400 | [diff] [blame] | 928 | case QH_STATE_COMPLETING: |
Alan Stern | df20225 | 2012-07-11 11:22:26 -0400 | [diff] [blame] | 929 | start_unlink_intr(ehci, qh); |
Alan Stern | a448c9d | 2009-08-19 12:22:44 -0400 | [diff] [blame] | 930 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | case QH_STATE_IDLE: |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 932 | qh_completions (ehci, qh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | break; |
| 934 | default: |
| 935 | ehci_dbg (ehci, "bogus qh %p state %d\n", |
| 936 | qh, qh->qh_state); |
| 937 | goto done; |
| 938 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | break; |
| 940 | |
| 941 | case PIPE_ISOCHRONOUS: |
| 942 | // itd or sitd ... |
| 943 | |
| 944 | // wait till next completion, do it then. |
| 945 | // completion irqs can wait up to 1024 msec, |
| 946 | break; |
| 947 | } |
| 948 | done: |
| 949 | spin_unlock_irqrestore (&ehci->lock, flags); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 950 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | } |
| 952 | |
| 953 | /*-------------------------------------------------------------------------*/ |
| 954 | |
| 955 | // bulk qh holds the data toggle |
| 956 | |
| 957 | static void |
| 958 | ehci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep) |
| 959 | { |
| 960 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
| 961 | unsigned long flags; |
| 962 | struct ehci_qh *qh, *tmp; |
| 963 | |
| 964 | /* ASSERT: any requests/urbs are being unlinked */ |
| 965 | /* ASSERT: nobody can be submitting urbs for this any more */ |
| 966 | |
| 967 | rescan: |
| 968 | spin_lock_irqsave (&ehci->lock, flags); |
| 969 | qh = ep->hcpriv; |
| 970 | if (!qh) |
| 971 | goto done; |
| 972 | |
| 973 | /* endpoints can be iso streams. for now, we don't |
| 974 | * accelerate iso completions ... so spin a while. |
| 975 | */ |
Clemens Ladisch | 1082f57 | 2010-03-01 17:18:56 +0100 | [diff] [blame] | 976 | if (qh->hw == NULL) { |
Alan Stern | 8c5bf7b | 2012-07-11 11:22:39 -0400 | [diff] [blame] | 977 | struct ehci_iso_stream *stream = ep->hcpriv; |
| 978 | |
| 979 | if (!list_empty(&stream->td_list)) |
| 980 | goto idle_timeout; |
| 981 | |
| 982 | /* BUG_ON(!list_empty(&stream->free_list)); */ |
| 983 | kfree(stream); |
| 984 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | } |
| 986 | |
Alan Stern | c0c53db | 2012-07-11 11:21:48 -0400 | [diff] [blame] | 987 | if (ehci->rh_state < EHCI_RH_RUNNING) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | qh->qh_state = QH_STATE_IDLE; |
| 989 | switch (qh->qh_state) { |
| 990 | case QH_STATE_LINKED: |
Alan Stern | 3a44494 | 2009-08-19 12:22:06 -0400 | [diff] [blame] | 991 | case QH_STATE_COMPLETING: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | for (tmp = ehci->async->qh_next.qh; |
| 993 | tmp && tmp != qh; |
| 994 | tmp = tmp->qh_next.qh) |
| 995 | continue; |
Alan Stern | 02e2c51 | 2010-11-16 10:57:37 -0500 | [diff] [blame] | 996 | /* periodic qh self-unlinks on empty, and a COMPLETING qh |
| 997 | * may already be unlinked. |
| 998 | */ |
| 999 | if (tmp) |
Alan Stern | 3c273a0 | 2012-07-11 11:22:49 -0400 | [diff] [blame] | 1000 | start_unlink_async(ehci, qh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | /* FALL THROUGH */ |
| 1002 | case QH_STATE_UNLINK: /* wait for hw to finish? */ |
Alan Stern | 07d29b6 | 2007-12-11 16:05:30 -0500 | [diff] [blame] | 1003 | case QH_STATE_UNLINK_WAIT: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | idle_timeout: |
| 1005 | spin_unlock_irqrestore (&ehci->lock, flags); |
Nishanth Aravamudan | 22c4386 | 2005-08-15 11:30:11 -0700 | [diff] [blame] | 1006 | schedule_timeout_uninterruptible(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | goto rescan; |
| 1008 | case QH_STATE_IDLE: /* fully unlinked */ |
Alan Stern | 914b701 | 2009-06-29 10:47:30 -0400 | [diff] [blame] | 1009 | if (qh->clearing_tt) |
| 1010 | goto idle_timeout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | if (list_empty (&qh->qtd_list)) { |
Alan Stern | c83e1a9 | 2012-07-11 11:21:25 -0400 | [diff] [blame] | 1012 | qh_destroy(ehci, qh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | break; |
| 1014 | } |
| 1015 | /* else FALL THROUGH */ |
| 1016 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | /* caller was supposed to have unlinked any requests; |
| 1018 | * that's not our job. just leak this memory. |
| 1019 | */ |
| 1020 | ehci_err (ehci, "qh %p (#%02x) state %d%s\n", |
| 1021 | qh, ep->desc.bEndpointAddress, qh->qh_state, |
| 1022 | list_empty (&qh->qtd_list) ? "" : "(has tds)"); |
| 1023 | break; |
| 1024 | } |
Alan Stern | 8c5bf7b | 2012-07-11 11:22:39 -0400 | [diff] [blame] | 1025 | done: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | ep->hcpriv = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | spin_unlock_irqrestore (&ehci->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | } |
| 1029 | |
Alan Stern | b18ffd4 | 2009-05-27 18:21:56 -0400 | [diff] [blame] | 1030 | static void |
| 1031 | ehci_endpoint_reset(struct usb_hcd *hcd, struct usb_host_endpoint *ep) |
| 1032 | { |
| 1033 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
| 1034 | struct ehci_qh *qh; |
| 1035 | int eptype = usb_endpoint_type(&ep->desc); |
Alan Stern | a455212d | 2009-06-11 14:56:22 -0400 | [diff] [blame] | 1036 | int epnum = usb_endpoint_num(&ep->desc); |
| 1037 | int is_out = usb_endpoint_dir_out(&ep->desc); |
| 1038 | unsigned long flags; |
Alan Stern | b18ffd4 | 2009-05-27 18:21:56 -0400 | [diff] [blame] | 1039 | |
| 1040 | if (eptype != USB_ENDPOINT_XFER_BULK && eptype != USB_ENDPOINT_XFER_INT) |
| 1041 | return; |
| 1042 | |
Alan Stern | a455212d | 2009-06-11 14:56:22 -0400 | [diff] [blame] | 1043 | spin_lock_irqsave(&ehci->lock, flags); |
Alan Stern | b18ffd4 | 2009-05-27 18:21:56 -0400 | [diff] [blame] | 1044 | qh = ep->hcpriv; |
| 1045 | |
| 1046 | /* For Bulk and Interrupt endpoints we maintain the toggle state |
| 1047 | * in the hardware; the toggle bits in udev aren't used at all. |
| 1048 | * When an endpoint is reset by usb_clear_halt() we must reset |
| 1049 | * the toggle bit in the QH. |
| 1050 | */ |
| 1051 | if (qh) { |
Alan Stern | a455212d | 2009-06-11 14:56:22 -0400 | [diff] [blame] | 1052 | usb_settoggle(qh->dev, epnum, is_out, 0); |
Alan Stern | b18ffd4 | 2009-05-27 18:21:56 -0400 | [diff] [blame] | 1053 | if (!list_empty(&qh->qtd_list)) { |
| 1054 | WARN_ONCE(1, "clear_halt for a busy endpoint\n"); |
Alan Stern | 3a44494 | 2009-08-19 12:22:06 -0400 | [diff] [blame] | 1055 | } else if (qh->qh_state == QH_STATE_LINKED || |
| 1056 | qh->qh_state == QH_STATE_COMPLETING) { |
Alan Stern | a455212d | 2009-06-11 14:56:22 -0400 | [diff] [blame] | 1057 | |
| 1058 | /* The toggle value in the QH can't be updated |
| 1059 | * while the QH is active. Unlink it now; |
| 1060 | * re-linking will call qh_refresh(). |
Alan Stern | b18ffd4 | 2009-05-27 18:21:56 -0400 | [diff] [blame] | 1061 | */ |
Alan Stern | a448c9d | 2009-08-19 12:22:44 -0400 | [diff] [blame] | 1062 | if (eptype == USB_ENDPOINT_XFER_BULK) |
Alan Stern | 3c273a0 | 2012-07-11 11:22:49 -0400 | [diff] [blame] | 1063 | start_unlink_async(ehci, qh); |
Alan Stern | a448c9d | 2009-08-19 12:22:44 -0400 | [diff] [blame] | 1064 | else |
Alan Stern | df20225 | 2012-07-11 11:22:26 -0400 | [diff] [blame] | 1065 | start_unlink_intr(ehci, qh); |
Alan Stern | b18ffd4 | 2009-05-27 18:21:56 -0400 | [diff] [blame] | 1066 | } |
| 1067 | } |
Alan Stern | a455212d | 2009-06-11 14:56:22 -0400 | [diff] [blame] | 1068 | spin_unlock_irqrestore(&ehci->lock, flags); |
Alan Stern | b18ffd4 | 2009-05-27 18:21:56 -0400 | [diff] [blame] | 1069 | } |
| 1070 | |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 1071 | static int ehci_get_frame (struct usb_hcd *hcd) |
| 1072 | { |
| 1073 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
Alan Stern | 68aa95d | 2011-10-12 10:39:14 -0400 | [diff] [blame] | 1074 | return (ehci_read_frame_index(ehci) >> 3) % ehci->periodic_size; |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 1075 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | |
| 1077 | /*-------------------------------------------------------------------------*/ |
Alan Stern | c5cf921 | 2012-06-28 11:19:02 -0400 | [diff] [blame] | 1078 | |
| 1079 | #ifdef CONFIG_PM |
| 1080 | |
| 1081 | /* suspend/resume, section 4.3 */ |
| 1082 | |
| 1083 | /* These routines handle the generic parts of controller suspend/resume */ |
| 1084 | |
Alan Stern | 3e02320 | 2012-11-01 11:12:58 -0400 | [diff] [blame] | 1085 | int ehci_suspend(struct usb_hcd *hcd, bool do_wakeup) |
Alan Stern | c5cf921 | 2012-06-28 11:19:02 -0400 | [diff] [blame] | 1086 | { |
| 1087 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
| 1088 | |
| 1089 | if (time_before(jiffies, ehci->next_statechange)) |
| 1090 | msleep(10); |
| 1091 | |
| 1092 | /* |
| 1093 | * Root hub was already suspended. Disable IRQ emission and |
| 1094 | * mark HW unaccessible. The PM and USB cores make sure that |
| 1095 | * the root hub is either suspended or stopped. |
| 1096 | */ |
| 1097 | ehci_prepare_ports_for_controller_suspend(ehci, do_wakeup); |
| 1098 | |
| 1099 | spin_lock_irq(&ehci->lock); |
| 1100 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); |
| 1101 | (void) ehci_readl(ehci, &ehci->regs->intr_enable); |
| 1102 | |
| 1103 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
| 1104 | spin_unlock_irq(&ehci->lock); |
| 1105 | |
| 1106 | return 0; |
| 1107 | } |
Alan Stern | 3e02320 | 2012-11-01 11:12:58 -0400 | [diff] [blame] | 1108 | EXPORT_SYMBOL_GPL(ehci_suspend); |
Alan Stern | c5cf921 | 2012-06-28 11:19:02 -0400 | [diff] [blame] | 1109 | |
| 1110 | /* Returns 0 if power was preserved, 1 if power was lost */ |
Alan Stern | 3e02320 | 2012-11-01 11:12:58 -0400 | [diff] [blame] | 1111 | int ehci_resume(struct usb_hcd *hcd, bool hibernated) |
Alan Stern | c5cf921 | 2012-06-28 11:19:02 -0400 | [diff] [blame] | 1112 | { |
| 1113 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
| 1114 | |
| 1115 | if (time_before(jiffies, ehci->next_statechange)) |
| 1116 | msleep(100); |
| 1117 | |
| 1118 | /* Mark hardware accessible again as we are back to full power by now */ |
| 1119 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
| 1120 | |
Alan Stern | 43fe3a9 | 2012-07-11 11:23:16 -0400 | [diff] [blame] | 1121 | if (ehci->shutdown) |
| 1122 | return 0; /* Controller is dead */ |
| 1123 | |
Alan Stern | c5cf921 | 2012-06-28 11:19:02 -0400 | [diff] [blame] | 1124 | /* |
| 1125 | * If CF is still set and we aren't resuming from hibernation |
| 1126 | * then we maintained suspend power. |
| 1127 | * Just undo the effect of ehci_suspend(). |
| 1128 | */ |
| 1129 | if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF && |
| 1130 | !hibernated) { |
| 1131 | int mask = INTR_MASK; |
| 1132 | |
| 1133 | ehci_prepare_ports_for_controller_resume(ehci); |
Alan Stern | 43fe3a9 | 2012-07-11 11:23:16 -0400 | [diff] [blame] | 1134 | |
| 1135 | spin_lock_irq(&ehci->lock); |
| 1136 | if (ehci->shutdown) |
| 1137 | goto skip; |
| 1138 | |
Alan Stern | c5cf921 | 2012-06-28 11:19:02 -0400 | [diff] [blame] | 1139 | if (!hcd->self.root_hub->do_remote_wakeup) |
| 1140 | mask &= ~STS_PCD; |
| 1141 | ehci_writel(ehci, mask, &ehci->regs->intr_enable); |
| 1142 | ehci_readl(ehci, &ehci->regs->intr_enable); |
Alan Stern | 43fe3a9 | 2012-07-11 11:23:16 -0400 | [diff] [blame] | 1143 | skip: |
| 1144 | spin_unlock_irq(&ehci->lock); |
Alan Stern | c5cf921 | 2012-06-28 11:19:02 -0400 | [diff] [blame] | 1145 | return 0; |
| 1146 | } |
| 1147 | |
| 1148 | /* |
| 1149 | * Else reset, to cope with power loss or resume from hibernation |
| 1150 | * having let the firmware kick in during reboot. |
| 1151 | */ |
| 1152 | usb_root_hub_lost_power(hcd->self.root_hub); |
| 1153 | (void) ehci_halt(ehci); |
| 1154 | (void) ehci_reset(ehci); |
| 1155 | |
Alan Stern | 43fe3a9 | 2012-07-11 11:23:16 -0400 | [diff] [blame] | 1156 | spin_lock_irq(&ehci->lock); |
| 1157 | if (ehci->shutdown) |
| 1158 | goto skip; |
| 1159 | |
Alan Stern | c5cf921 | 2012-06-28 11:19:02 -0400 | [diff] [blame] | 1160 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
| 1161 | ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag); |
| 1162 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ |
| 1163 | |
Alan Stern | 43fe3a9 | 2012-07-11 11:23:16 -0400 | [diff] [blame] | 1164 | ehci->rh_state = EHCI_RH_SUSPENDED; |
| 1165 | spin_unlock_irq(&ehci->lock); |
| 1166 | |
Alan Stern | c5cf921 | 2012-06-28 11:19:02 -0400 | [diff] [blame] | 1167 | return 1; |
| 1168 | } |
Alan Stern | 3e02320 | 2012-11-01 11:12:58 -0400 | [diff] [blame] | 1169 | EXPORT_SYMBOL_GPL(ehci_resume); |
Alan Stern | c5cf921 | 2012-06-28 11:19:02 -0400 | [diff] [blame] | 1170 | |
| 1171 | #endif |
| 1172 | |
| 1173 | /*-------------------------------------------------------------------------*/ |
| 1174 | |
Alexander Shishkin | eb70e5a | 2012-05-11 17:25:54 +0300 | [diff] [blame] | 1175 | /* |
Alan Stern | 3e02320 | 2012-11-01 11:12:58 -0400 | [diff] [blame] | 1176 | * Generic structure: This gets copied for platform drivers so that |
| 1177 | * individual entries can be overridden as needed. |
| 1178 | */ |
| 1179 | |
| 1180 | static const struct hc_driver ehci_hc_driver = { |
| 1181 | .description = hcd_name, |
| 1182 | .product_desc = "EHCI Host Controller", |
| 1183 | .hcd_priv_size = sizeof(struct ehci_hcd), |
| 1184 | |
| 1185 | /* |
| 1186 | * generic hardware linkage |
| 1187 | */ |
| 1188 | .irq = ehci_irq, |
| 1189 | .flags = HCD_MEMORY | HCD_USB2, |
| 1190 | |
| 1191 | /* |
| 1192 | * basic lifecycle operations |
| 1193 | */ |
| 1194 | .reset = ehci_setup, |
| 1195 | .start = ehci_run, |
| 1196 | .stop = ehci_stop, |
| 1197 | .shutdown = ehci_shutdown, |
| 1198 | |
| 1199 | /* |
| 1200 | * managing i/o requests and associated device resources |
| 1201 | */ |
| 1202 | .urb_enqueue = ehci_urb_enqueue, |
| 1203 | .urb_dequeue = ehci_urb_dequeue, |
| 1204 | .endpoint_disable = ehci_endpoint_disable, |
| 1205 | .endpoint_reset = ehci_endpoint_reset, |
| 1206 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, |
| 1207 | |
| 1208 | /* |
| 1209 | * scheduling support |
| 1210 | */ |
| 1211 | .get_frame_number = ehci_get_frame, |
| 1212 | |
| 1213 | /* |
| 1214 | * root hub support |
| 1215 | */ |
| 1216 | .hub_status_data = ehci_hub_status_data, |
| 1217 | .hub_control = ehci_hub_control, |
| 1218 | .bus_suspend = ehci_bus_suspend, |
| 1219 | .bus_resume = ehci_bus_resume, |
| 1220 | .relinquish_port = ehci_relinquish_port, |
| 1221 | .port_handed_over = ehci_port_handed_over, |
| 1222 | }; |
| 1223 | |
| 1224 | void ehci_init_driver(struct hc_driver *drv, |
| 1225 | const struct ehci_driver_overrides *over) |
| 1226 | { |
| 1227 | /* Copy the generic table to drv and then apply the overrides */ |
| 1228 | *drv = ehci_hc_driver; |
| 1229 | |
Alan Stern | 1b36810 | 2012-11-07 16:12:47 -0500 | [diff] [blame] | 1230 | if (over) { |
| 1231 | drv->hcd_priv_size += over->extra_priv_size; |
| 1232 | if (over->reset) |
| 1233 | drv->reset = over->reset; |
| 1234 | } |
Alan Stern | 3e02320 | 2012-11-01 11:12:58 -0400 | [diff] [blame] | 1235 | } |
| 1236 | EXPORT_SYMBOL_GPL(ehci_init_driver); |
| 1237 | |
| 1238 | /*-------------------------------------------------------------------------*/ |
| 1239 | |
Alan Stern | 2b70f07 | 2008-10-02 11:47:15 -0400 | [diff] [blame] | 1240 | MODULE_DESCRIPTION(DRIVER_DESC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | MODULE_AUTHOR (DRIVER_AUTHOR); |
| 1242 | MODULE_LICENSE ("GPL"); |
| 1243 | |
Li Yang | ba02978 | 2007-05-11 17:09:55 +0800 | [diff] [blame] | 1244 | #ifdef CONFIG_USB_EHCI_FSL |
Randy Vinson | 80cb9ae | 2006-01-20 13:53:38 -0800 | [diff] [blame] | 1245 | #include "ehci-fsl.c" |
Kumar Gala | 01cced2 | 2006-04-11 10:07:16 -0500 | [diff] [blame] | 1246 | #define PLATFORM_DRIVER ehci_fsl_driver |
Randy Vinson | 80cb9ae | 2006-01-20 13:53:38 -0800 | [diff] [blame] | 1247 | #endif |
| 1248 | |
Yoshihiro Shimoda | 60b0bf0 | 2011-03-01 16:58:37 +0900 | [diff] [blame] | 1249 | #ifdef CONFIG_USB_EHCI_SH |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 1250 | #include "ehci-sh.c" |
| 1251 | #define PLATFORM_DRIVER ehci_hcd_sh_driver |
| 1252 | #endif |
| 1253 | |
Keshava Munegowda | 7f124f4 | 2010-11-21 23:23:41 +0530 | [diff] [blame] | 1254 | #ifdef CONFIG_USB_EHCI_HCD_OMAP |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 1255 | #include "ehci-omap.c" |
| 1256 | #define PLATFORM_DRIVER ehci_hcd_omap_driver |
| 1257 | #endif |
| 1258 | |
Geoff Levand | ad75a41 | 2007-01-15 20:11:47 -0800 | [diff] [blame] | 1259 | #ifdef CONFIG_PPC_PS3 |
| 1260 | #include "ehci-ps3.c" |
Geoff Levand | 7a4eb7f | 2007-06-05 20:04:35 -0700 | [diff] [blame] | 1261 | #define PS3_SYSTEM_BUS_DRIVER ps3_ehci_driver |
Geoff Levand | ad75a41 | 2007-01-15 20:11:47 -0800 | [diff] [blame] | 1262 | #endif |
| 1263 | |
Valentine Barshak | da0e8fb | 2007-12-30 15:28:50 -0800 | [diff] [blame] | 1264 | #ifdef CONFIG_USB_EHCI_HCD_PPC_OF |
| 1265 | #include "ehci-ppc-of.c" |
| 1266 | #define OF_PLATFORM_DRIVER ehci_hcd_ppc_of_driver |
| 1267 | #endif |
| 1268 | |
Julie Zhu | 08d3c18 | 2009-09-21 16:08:19 -0600 | [diff] [blame] | 1269 | #ifdef CONFIG_XPS_USB_HCD_XILINX |
| 1270 | #include "ehci-xilinx-of.c" |
Grant Likely | 1f23b2d | 2010-06-02 13:53:17 -0600 | [diff] [blame] | 1271 | #define XILINX_OF_PLATFORM_DRIVER ehci_hcd_xilinx_of_driver |
Julie Zhu | 08d3c18 | 2009-09-21 16:08:19 -0600 | [diff] [blame] | 1272 | #endif |
| 1273 | |
Lennert Buytenhek | 705a752 | 2008-03-27 14:51:40 -0400 | [diff] [blame] | 1274 | #ifdef CONFIG_PLAT_ORION |
Tzachi Perelstein | e96ffe2 | 2007-12-01 11:07:04 -0500 | [diff] [blame] | 1275 | #include "ehci-orion.c" |
| 1276 | #define PLATFORM_DRIVER ehci_orion_driver |
| 1277 | #endif |
| 1278 | |
Wan ZongShun | 586dfc8 | 2009-06-13 09:14:28 +0800 | [diff] [blame] | 1279 | #ifdef CONFIG_USB_W90X900_EHCI |
| 1280 | #include "ehci-w90x900.c" |
| 1281 | #define PLATFORM_DRIVER ehci_hcd_w90x900_driver |
| 1282 | #endif |
| 1283 | |
Nicolas Ferre | 501c9c0 | 2009-07-27 14:47:40 -0700 | [diff] [blame] | 1284 | #ifdef CONFIG_ARCH_AT91 |
| 1285 | #include "ehci-atmel.c" |
| 1286 | #define PLATFORM_DRIVER ehci_atmel_driver |
| 1287 | #endif |
| 1288 | |
David Daney | 1643acc | 2010-10-08 14:47:52 -0700 | [diff] [blame] | 1289 | #ifdef CONFIG_USB_OCTEON_EHCI |
| 1290 | #include "ehci-octeon.c" |
| 1291 | #define PLATFORM_DRIVER ehci_octeon_driver |
| 1292 | #endif |
| 1293 | |
Alexey Charkov | ad78aca | 2010-11-07 19:28:55 +0300 | [diff] [blame] | 1294 | #ifdef CONFIG_ARCH_VT8500 |
| 1295 | #include "ehci-vt8500.c" |
| 1296 | #define PLATFORM_DRIVER vt8500_ehci_driver |
| 1297 | #endif |
| 1298 | |
Deepak Sikri | c8c38de | 2010-11-10 14:33:18 +0530 | [diff] [blame] | 1299 | #ifdef CONFIG_PLAT_SPEAR |
| 1300 | #include "ehci-spear.c" |
| 1301 | #define PLATFORM_DRIVER spear_ehci_hcd_driver |
| 1302 | #endif |
| 1303 | |
Pavankumar Kondeti | b0848ae | 2010-12-07 17:53:56 +0530 | [diff] [blame] | 1304 | #ifdef CONFIG_USB_EHCI_MSM |
| 1305 | #include "ehci-msm.c" |
| 1306 | #define PLATFORM_DRIVER ehci_msm_driver |
| 1307 | #endif |
| 1308 | |
Chris Metcalf | 47fc28b | 2012-05-09 13:58:14 -0400 | [diff] [blame] | 1309 | #ifdef CONFIG_TILE_USB |
| 1310 | #include "ehci-tilegx.c" |
| 1311 | #define PLATFORM_DRIVER ehci_hcd_tilegx_driver |
| 1312 | #endif |
| 1313 | |
Anoop | 22ced687 | 2011-02-24 19:26:28 +0530 | [diff] [blame] | 1314 | #ifdef CONFIG_USB_EHCI_HCD_PMC_MSP |
| 1315 | #include "ehci-pmcmsp.c" |
| 1316 | #define PLATFORM_DRIVER ehci_hcd_msp_driver |
| 1317 | #endif |
| 1318 | |
Benoit Goby | 79ad3b5 | 2011-03-09 16:28:56 -0800 | [diff] [blame] | 1319 | #ifdef CONFIG_USB_EHCI_TEGRA |
| 1320 | #include "ehci-tegra.c" |
| 1321 | #define PLATFORM_DRIVER tegra_ehci_driver |
| 1322 | #endif |
| 1323 | |
Joonyoung Shim | 1bcc5aa | 2011-04-08 14:08:50 +0900 | [diff] [blame] | 1324 | #ifdef CONFIG_USB_EHCI_S5P |
| 1325 | #include "ehci-s5p.c" |
| 1326 | #define PLATFORM_DRIVER s5p_ehci_driver |
| 1327 | #endif |
| 1328 | |
Jan Andersson | 9be0392 | 2011-05-03 20:11:58 +0200 | [diff] [blame] | 1329 | #ifdef CONFIG_SPARC_LEON |
| 1330 | #include "ehci-grlib.c" |
| 1331 | #define PLATFORM_DRIVER ehci_grlib_driver |
| 1332 | #endif |
| 1333 | |
Neil Zhang | 3a082ec | 2011-12-20 13:20:23 +0800 | [diff] [blame] | 1334 | #ifdef CONFIG_USB_EHCI_MV |
| 1335 | #include "ehci-mv.c" |
| 1336 | #define PLATFORM_DRIVER ehci_mv_driver |
| 1337 | #endif |
| 1338 | |
Steven J. Hill | c256667 | 2012-04-19 12:57:31 -0500 | [diff] [blame] | 1339 | #ifdef CONFIG_MIPS_SEAD3 |
| 1340 | #include "ehci-sead3.c" |
| 1341 | #define PLATFORM_DRIVER ehci_hcd_sead3_driver |
| 1342 | #endif |
| 1343 | |
Alan Stern | adfa79d | 2012-11-01 11:13:04 -0400 | [diff] [blame] | 1344 | #if !IS_ENABLED(CONFIG_USB_EHCI_PCI) && \ |
Alan Stern | 99f9193 | 2012-11-01 11:13:08 -0400 | [diff] [blame] | 1345 | !IS_ENABLED(CONFIG_USB_EHCI_HCD_PLATFORM) && \ |
Alan Stern | 9ce45ef | 2013-01-22 12:00:12 -0500 | [diff] [blame] | 1346 | !IS_ENABLED(CONFIG_USB_CHIPIDEA_HOST) && \ |
Alan Stern | dba63b2 | 2013-01-23 13:26:15 -0500 | [diff] [blame] | 1347 | !IS_ENABLED(CONFIG_USB_EHCI_MXC) && \ |
Alan Stern | adfa79d | 2012-11-01 11:13:04 -0400 | [diff] [blame] | 1348 | !defined(PLATFORM_DRIVER) && \ |
| 1349 | !defined(PS3_SYSTEM_BUS_DRIVER) && \ |
| 1350 | !defined(OF_PLATFORM_DRIVER) && \ |
| 1351 | !defined(XILINX_OF_PLATFORM_DRIVER) |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 1352 | #error "missing bus glue for ehci-hcd" |
| 1353 | #endif |
Kumar Gala | 01cced2 | 2006-04-11 10:07:16 -0500 | [diff] [blame] | 1354 | |
| 1355 | static int __init ehci_hcd_init(void) |
| 1356 | { |
| 1357 | int retval = 0; |
| 1358 | |
Alan Stern | 2b70f07 | 2008-10-02 11:47:15 -0400 | [diff] [blame] | 1359 | if (usb_disabled()) |
| 1360 | return -ENODEV; |
| 1361 | |
| 1362 | printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name); |
Alan Stern | 9beeee6 | 2008-10-02 11:48:13 -0400 | [diff] [blame] | 1363 | set_bit(USB_EHCI_LOADED, &usb_hcds_loaded); |
| 1364 | if (test_bit(USB_UHCI_LOADED, &usb_hcds_loaded) || |
| 1365 | test_bit(USB_OHCI_LOADED, &usb_hcds_loaded)) |
| 1366 | printk(KERN_WARNING "Warning! ehci_hcd should always be loaded" |
| 1367 | " before uhci_hcd and ohci_hcd, not after\n"); |
| 1368 | |
Kumar Gala | 01cced2 | 2006-04-11 10:07:16 -0500 | [diff] [blame] | 1369 | pr_debug("%s: block sizes: qh %Zd qtd %Zd itd %Zd sitd %Zd\n", |
| 1370 | hcd_name, |
| 1371 | sizeof(struct ehci_qh), sizeof(struct ehci_qtd), |
| 1372 | sizeof(struct ehci_itd), sizeof(struct ehci_sitd)); |
| 1373 | |
Tony Jones | 694cc20 | 2007-09-11 14:07:31 -0700 | [diff] [blame] | 1374 | #ifdef DEBUG |
Greg Kroah-Hartman | 08f4e58 | 2009-04-24 15:13:18 -0700 | [diff] [blame] | 1375 | ehci_debug_root = debugfs_create_dir("ehci", usb_debug_root); |
Alan Stern | 9beeee6 | 2008-10-02 11:48:13 -0400 | [diff] [blame] | 1376 | if (!ehci_debug_root) { |
| 1377 | retval = -ENOENT; |
| 1378 | goto err_debug; |
| 1379 | } |
Tony Jones | 694cc20 | 2007-09-11 14:07:31 -0700 | [diff] [blame] | 1380 | #endif |
| 1381 | |
Kumar Gala | 01cced2 | 2006-04-11 10:07:16 -0500 | [diff] [blame] | 1382 | #ifdef PLATFORM_DRIVER |
| 1383 | retval = platform_driver_register(&PLATFORM_DRIVER); |
Valentine Barshak | da0e8fb | 2007-12-30 15:28:50 -0800 | [diff] [blame] | 1384 | if (retval < 0) |
| 1385 | goto clean0; |
Kumar Gala | 01cced2 | 2006-04-11 10:07:16 -0500 | [diff] [blame] | 1386 | #endif |
| 1387 | |
Geoff Levand | ad75a41 | 2007-01-15 20:11:47 -0800 | [diff] [blame] | 1388 | #ifdef PS3_SYSTEM_BUS_DRIVER |
Geoff Levand | 7a4eb7f | 2007-06-05 20:04:35 -0700 | [diff] [blame] | 1389 | retval = ps3_ehci_driver_register(&PS3_SYSTEM_BUS_DRIVER); |
Valentine Barshak | da0e8fb | 2007-12-30 15:28:50 -0800 | [diff] [blame] | 1390 | if (retval < 0) |
| 1391 | goto clean2; |
Kumar Gala | 01cced2 | 2006-04-11 10:07:16 -0500 | [diff] [blame] | 1392 | #endif |
| 1393 | |
Valentine Barshak | da0e8fb | 2007-12-30 15:28:50 -0800 | [diff] [blame] | 1394 | #ifdef OF_PLATFORM_DRIVER |
Grant Likely | d35fb64 | 2011-02-22 21:08:34 -0700 | [diff] [blame] | 1395 | retval = platform_driver_register(&OF_PLATFORM_DRIVER); |
Valentine Barshak | da0e8fb | 2007-12-30 15:28:50 -0800 | [diff] [blame] | 1396 | if (retval < 0) |
| 1397 | goto clean3; |
| 1398 | #endif |
Grant Likely | 1f23b2d | 2010-06-02 13:53:17 -0600 | [diff] [blame] | 1399 | |
| 1400 | #ifdef XILINX_OF_PLATFORM_DRIVER |
Grant Likely | d35fb64 | 2011-02-22 21:08:34 -0700 | [diff] [blame] | 1401 | retval = platform_driver_register(&XILINX_OF_PLATFORM_DRIVER); |
Grant Likely | 1f23b2d | 2010-06-02 13:53:17 -0600 | [diff] [blame] | 1402 | if (retval < 0) |
| 1403 | goto clean4; |
| 1404 | #endif |
Valentine Barshak | da0e8fb | 2007-12-30 15:28:50 -0800 | [diff] [blame] | 1405 | return retval; |
| 1406 | |
Grant Likely | 1f23b2d | 2010-06-02 13:53:17 -0600 | [diff] [blame] | 1407 | #ifdef XILINX_OF_PLATFORM_DRIVER |
Grant Likely | d35fb64 | 2011-02-22 21:08:34 -0700 | [diff] [blame] | 1408 | /* platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER); */ |
Grant Likely | 1f23b2d | 2010-06-02 13:53:17 -0600 | [diff] [blame] | 1409 | clean4: |
| 1410 | #endif |
Valentine Barshak | da0e8fb | 2007-12-30 15:28:50 -0800 | [diff] [blame] | 1411 | #ifdef OF_PLATFORM_DRIVER |
Grant Likely | d35fb64 | 2011-02-22 21:08:34 -0700 | [diff] [blame] | 1412 | platform_driver_unregister(&OF_PLATFORM_DRIVER); |
Valentine Barshak | da0e8fb | 2007-12-30 15:28:50 -0800 | [diff] [blame] | 1413 | clean3: |
| 1414 | #endif |
| 1415 | #ifdef PS3_SYSTEM_BUS_DRIVER |
| 1416 | ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER); |
| 1417 | clean2: |
| 1418 | #endif |
Valentine Barshak | da0e8fb | 2007-12-30 15:28:50 -0800 | [diff] [blame] | 1419 | #ifdef PLATFORM_DRIVER |
| 1420 | platform_driver_unregister(&PLATFORM_DRIVER); |
| 1421 | clean0: |
| 1422 | #endif |
| 1423 | #ifdef DEBUG |
| 1424 | debugfs_remove(ehci_debug_root); |
| 1425 | ehci_debug_root = NULL; |
Alan Stern | 9beeee6 | 2008-10-02 11:48:13 -0400 | [diff] [blame] | 1426 | err_debug: |
Linus Torvalds | a9b6148 | 2008-10-20 14:23:29 -0700 | [diff] [blame] | 1427 | #endif |
Alan Stern | 9beeee6 | 2008-10-02 11:48:13 -0400 | [diff] [blame] | 1428 | clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded); |
Kumar Gala | 01cced2 | 2006-04-11 10:07:16 -0500 | [diff] [blame] | 1429 | return retval; |
| 1430 | } |
| 1431 | module_init(ehci_hcd_init); |
| 1432 | |
| 1433 | static void __exit ehci_hcd_cleanup(void) |
| 1434 | { |
Grant Likely | 1f23b2d | 2010-06-02 13:53:17 -0600 | [diff] [blame] | 1435 | #ifdef XILINX_OF_PLATFORM_DRIVER |
Grant Likely | d35fb64 | 2011-02-22 21:08:34 -0700 | [diff] [blame] | 1436 | platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER); |
Grant Likely | 1f23b2d | 2010-06-02 13:53:17 -0600 | [diff] [blame] | 1437 | #endif |
Valentine Barshak | da0e8fb | 2007-12-30 15:28:50 -0800 | [diff] [blame] | 1438 | #ifdef OF_PLATFORM_DRIVER |
Grant Likely | d35fb64 | 2011-02-22 21:08:34 -0700 | [diff] [blame] | 1439 | platform_driver_unregister(&OF_PLATFORM_DRIVER); |
Valentine Barshak | da0e8fb | 2007-12-30 15:28:50 -0800 | [diff] [blame] | 1440 | #endif |
Kumar Gala | 01cced2 | 2006-04-11 10:07:16 -0500 | [diff] [blame] | 1441 | #ifdef PLATFORM_DRIVER |
| 1442 | platform_driver_unregister(&PLATFORM_DRIVER); |
| 1443 | #endif |
Geoff Levand | ad75a41 | 2007-01-15 20:11:47 -0800 | [diff] [blame] | 1444 | #ifdef PS3_SYSTEM_BUS_DRIVER |
Geoff Levand | 7a4eb7f | 2007-06-05 20:04:35 -0700 | [diff] [blame] | 1445 | ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER); |
Geoff Levand | ad75a41 | 2007-01-15 20:11:47 -0800 | [diff] [blame] | 1446 | #endif |
Tony Jones | 694cc20 | 2007-09-11 14:07:31 -0700 | [diff] [blame] | 1447 | #ifdef DEBUG |
| 1448 | debugfs_remove(ehci_debug_root); |
| 1449 | #endif |
Alan Stern | 9beeee6 | 2008-10-02 11:48:13 -0400 | [diff] [blame] | 1450 | clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded); |
Kumar Gala | 01cced2 | 2006-04-11 10:07:16 -0500 | [diff] [blame] | 1451 | } |
| 1452 | module_exit(ehci_hcd_cleanup); |