Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2000-2004 by David Brownell |
David Brownell | 53bd6a6 | 2006-08-30 14:50:06 -0700 | [diff] [blame] | 3 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU General Public License as published by the |
| 6 | * Free Software Foundation; either version 2 of the License, or (at your |
| 7 | * option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, but |
| 10 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 11 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 12 | * for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software Foundation, |
| 16 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 17 | */ |
| 18 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/module.h> |
| 20 | #include <linux/pci.h> |
| 21 | #include <linux/dmapool.h> |
| 22 | #include <linux/kernel.h> |
| 23 | #include <linux/delay.h> |
| 24 | #include <linux/ioport.h> |
| 25 | #include <linux/sched.h> |
Ming Lei | 3c04e20 | 2008-09-18 23:06:21 +0800 | [diff] [blame] | 26 | #include <linux/vmalloc.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <linux/errno.h> |
| 28 | #include <linux/init.h> |
| 29 | #include <linux/timer.h> |
Oliver Neukum | ee4ecb8 | 2009-11-27 15:17:59 +0100 | [diff] [blame] | 30 | #include <linux/ktime.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <linux/list.h> |
| 32 | #include <linux/interrupt.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/usb.h> |
Eric Lescouet | 27729aa | 2010-04-24 23:21:52 +0200 | [diff] [blame] | 34 | #include <linux/usb/hcd.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/moduleparam.h> |
| 36 | #include <linux/dma-mapping.h> |
Tony Jones | 694cc20 | 2007-09-11 14:07:31 -0700 | [diff] [blame] | 37 | #include <linux/debugfs.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 38 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include <asm/byteorder.h> |
| 41 | #include <asm/io.h> |
| 42 | #include <asm/irq.h> |
| 43 | #include <asm/system.h> |
| 44 | #include <asm/unaligned.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
| 46 | /*-------------------------------------------------------------------------*/ |
| 47 | |
| 48 | /* |
| 49 | * EHCI hc_driver implementation ... experimental, incomplete. |
| 50 | * Based on the final 1.0 register interface specification. |
| 51 | * |
| 52 | * USB 2.0 shows up in upcoming www.pcmcia.org technology. |
| 53 | * First was PCMCIA, like ISA; then CardBus, which is PCI. |
| 54 | * Next comes "CardBay", using USB 2.0 signals. |
| 55 | * |
| 56 | * Contains additional contributions by Brad Hards, Rory Bolt, and others. |
| 57 | * Special thanks to Intel and VIA for providing host controllers to |
| 58 | * test this driver on, and Cypress (including In-System Design) for |
| 59 | * providing early devices for those host controllers to talk to! |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | */ |
| 61 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | #define DRIVER_AUTHOR "David Brownell" |
| 63 | #define DRIVER_DESC "USB 2.0 'Enhanced' Host Controller (EHCI) Driver" |
| 64 | |
| 65 | static const char hcd_name [] = "ehci_hcd"; |
| 66 | |
| 67 | |
David Brownell | 9776afc | 2008-02-01 11:42:05 -0800 | [diff] [blame] | 68 | #undef VERBOSE_DEBUG |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | #undef EHCI_URB_TRACE |
| 70 | |
| 71 | #ifdef DEBUG |
| 72 | #define EHCI_STATS |
| 73 | #endif |
| 74 | |
| 75 | /* magic numbers that can affect system performance */ |
| 76 | #define EHCI_TUNE_CERR 3 /* 0-3 qtd retries; 0 == don't stop */ |
| 77 | #define EHCI_TUNE_RL_HS 4 /* nak throttle; see 4.9 */ |
| 78 | #define EHCI_TUNE_RL_TT 0 |
| 79 | #define EHCI_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */ |
| 80 | #define EHCI_TUNE_MULT_TT 1 |
| 81 | #define EHCI_TUNE_FLS 2 /* (small) 256 frame schedule */ |
| 82 | |
Alan Stern | 07d29b6 | 2007-12-11 16:05:30 -0500 | [diff] [blame] | 83 | #define EHCI_IAA_MSECS 10 /* arbitrary */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | #define EHCI_IO_JIFFIES (HZ/10) /* io watchdog > irq_thresh */ |
| 85 | #define EHCI_ASYNC_JIFFIES (HZ/20) /* async idle timeout */ |
David Brownell | b963801 | 2008-06-03 22:21:55 -0700 | [diff] [blame] | 86 | #define EHCI_SHRINK_FRAMES 5 /* async qh unlink delay */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | |
| 88 | /* Initial IRQ latency: faster than hw default */ |
| 89 | static int log2_irq_thresh = 0; // 0 to 6 |
| 90 | module_param (log2_irq_thresh, int, S_IRUGO); |
| 91 | MODULE_PARM_DESC (log2_irq_thresh, "log2 IRQ latency, 1-64 microframes"); |
| 92 | |
| 93 | /* initial park setting: slower than hw default */ |
| 94 | static unsigned park = 0; |
| 95 | module_param (park, uint, S_IRUGO); |
| 96 | MODULE_PARM_DESC (park, "park setting; 1-3 back-to-back async packets"); |
| 97 | |
David Brownell | 93f1a47 | 2006-11-16 23:34:58 -0800 | [diff] [blame] | 98 | /* for flakey hardware, ignore overcurrent indicators */ |
| 99 | static int ignore_oc = 0; |
| 100 | module_param (ignore_oc, bool, S_IRUGO); |
| 101 | MODULE_PARM_DESC (ignore_oc, "ignore bogus hardware overcurrent indications"); |
| 102 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | #define INTR_MASK (STS_IAA | STS_FATAL | STS_PCD | STS_ERR | STS_INT) |
| 104 | |
| 105 | /*-------------------------------------------------------------------------*/ |
| 106 | |
| 107 | #include "ehci.h" |
| 108 | #include "ehci-dbg.c" |
| 109 | |
| 110 | /*-------------------------------------------------------------------------*/ |
| 111 | |
Alan Stern | bc29847 | 2009-02-11 14:26:38 -0500 | [diff] [blame] | 112 | static void |
| 113 | timer_action(struct ehci_hcd *ehci, enum ehci_timer_action action) |
| 114 | { |
| 115 | /* Don't override timeouts which shrink or (later) disable |
| 116 | * the async ring; just the I/O watchdog. Note that if a |
| 117 | * SHRINK were pending, OFF would never be requested. |
| 118 | */ |
| 119 | if (timer_pending(&ehci->watchdog) |
| 120 | && ((BIT(TIMER_ASYNC_SHRINK) | BIT(TIMER_ASYNC_OFF)) |
| 121 | & ehci->actions)) |
| 122 | return; |
| 123 | |
| 124 | if (!test_and_set_bit(action, &ehci->actions)) { |
| 125 | unsigned long t; |
| 126 | |
| 127 | switch (action) { |
| 128 | case TIMER_IO_WATCHDOG: |
Alek Du | 403dbd3 | 2009-07-13 17:30:41 +0800 | [diff] [blame] | 129 | if (!ehci->need_io_watchdog) |
| 130 | return; |
Alan Stern | bc29847 | 2009-02-11 14:26:38 -0500 | [diff] [blame] | 131 | t = EHCI_IO_JIFFIES; |
| 132 | break; |
| 133 | case TIMER_ASYNC_OFF: |
| 134 | t = EHCI_ASYNC_JIFFIES; |
| 135 | break; |
| 136 | /* case TIMER_ASYNC_SHRINK: */ |
| 137 | default: |
| 138 | /* add a jiffie since we synch against the |
| 139 | * 8 KHz uframe counter. |
| 140 | */ |
| 141 | t = DIV_ROUND_UP(EHCI_SHRINK_FRAMES * HZ, 1000) + 1; |
| 142 | break; |
| 143 | } |
| 144 | mod_timer(&ehci->watchdog, t + jiffies); |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | /*-------------------------------------------------------------------------*/ |
| 149 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | /* |
| 151 | * handshake - spin reading hc until handshake completes or fails |
| 152 | * @ptr: address of hc register to be read |
| 153 | * @mask: bits to look at in result of read |
| 154 | * @done: value of those bits when handshake succeeds |
| 155 | * @usec: timeout in microseconds |
| 156 | * |
| 157 | * Returns negative errno, or zero on success |
| 158 | * |
| 159 | * Success happens when the "mask" bits have the specified value (hardware |
| 160 | * handshake done). There are two failure modes: "usec" have passed (major |
| 161 | * hardware flakeout), or the register reads as all-ones (hardware removed). |
| 162 | * |
| 163 | * That last failure should_only happen in cases like physical cardbus eject |
| 164 | * before driver shutdown. But it also seems to be caused by bugs in cardbus |
| 165 | * bridge shutdown: shutting down the bridge before the devices using it. |
| 166 | */ |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 167 | static int handshake (struct ehci_hcd *ehci, void __iomem *ptr, |
| 168 | u32 mask, u32 done, int usec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | { |
| 170 | u32 result; |
| 171 | |
| 172 | do { |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 173 | result = ehci_readl(ehci, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | if (result == ~(u32)0) /* card removed */ |
| 175 | return -ENODEV; |
| 176 | result &= mask; |
| 177 | if (result == done) |
| 178 | return 0; |
| 179 | udelay (1); |
| 180 | usec--; |
| 181 | } while (usec > 0); |
| 182 | return -ETIMEDOUT; |
| 183 | } |
| 184 | |
| 185 | /* force HC to halt state from unknown (EHCI spec section 2.3) */ |
| 186 | static int ehci_halt (struct ehci_hcd *ehci) |
| 187 | { |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 188 | u32 temp = ehci_readl(ehci, &ehci->regs->status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | |
David Brownell | 72f30b6 | 2005-09-27 10:19:39 -0700 | [diff] [blame] | 190 | /* disable any irqs left enabled by previous code */ |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 191 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); |
David Brownell | 72f30b6 | 2005-09-27 10:19:39 -0700 | [diff] [blame] | 192 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | if ((temp & STS_HALT) != 0) |
| 194 | return 0; |
| 195 | |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 196 | temp = ehci_readl(ehci, &ehci->regs->command); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | temp &= ~CMD_RUN; |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 198 | ehci_writel(ehci, temp, &ehci->regs->command); |
| 199 | return handshake (ehci, &ehci->regs->status, |
| 200 | STS_HALT, STS_HALT, 16 * 125); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | } |
| 202 | |
David Brownell | 0bcfeb3 | 2008-08-26 14:43:46 -0700 | [diff] [blame] | 203 | static int handshake_on_error_set_halt(struct ehci_hcd *ehci, void __iomem *ptr, |
| 204 | u32 mask, u32 done, int usec) |
| 205 | { |
| 206 | int error; |
| 207 | |
| 208 | error = handshake(ehci, ptr, mask, done, usec); |
| 209 | if (error) { |
| 210 | ehci_halt(ehci); |
| 211 | ehci_to_hcd(ehci)->state = HC_STATE_HALT; |
Ozan Çağlayan | 65cb76b | 2009-10-13 08:37:09 +0300 | [diff] [blame] | 212 | ehci_err(ehci, "force halt; handshake %p %08x %08x -> %d\n", |
David Brownell | 0bcfeb3 | 2008-08-26 14:43:46 -0700 | [diff] [blame] | 213 | ptr, mask, done, error); |
| 214 | } |
| 215 | |
| 216 | return error; |
| 217 | } |
| 218 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | /* put TDI/ARC silicon into EHCI mode */ |
| 220 | static void tdi_reset (struct ehci_hcd *ehci) |
| 221 | { |
| 222 | u32 __iomem *reg_ptr; |
| 223 | u32 tmp; |
| 224 | |
Vladimir Barinov | d23a137 | 2007-05-23 20:07:48 +0400 | [diff] [blame] | 225 | reg_ptr = (u32 __iomem *)(((u8 __iomem *)ehci->regs) + USBMODE); |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 226 | tmp = ehci_readl(ehci, reg_ptr); |
Vladimir Barinov | d23a137 | 2007-05-23 20:07:48 +0400 | [diff] [blame] | 227 | tmp |= USBMODE_CM_HC; |
| 228 | /* The default byte access to MMR space is LE after |
| 229 | * controller reset. Set the required endian mode |
| 230 | * for transfer buffers to match the host microprocessor |
| 231 | */ |
| 232 | if (ehci_big_endian_mmio(ehci)) |
| 233 | tmp |= USBMODE_BE; |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 234 | ehci_writel(ehci, tmp, reg_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | } |
| 236 | |
| 237 | /* reset a non-running (STS_HALT == 1) controller */ |
| 238 | static int ehci_reset (struct ehci_hcd *ehci) |
| 239 | { |
| 240 | int retval; |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 241 | u32 command = ehci_readl(ehci, &ehci->regs->command); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | |
Jason Wessel | 8d053c7 | 2009-08-20 15:39:54 -0500 | [diff] [blame] | 243 | /* If the EHCI debug controller is active, special care must be |
| 244 | * taken before and after a host controller reset */ |
| 245 | if (ehci->debug && !dbgp_reset_prep()) |
| 246 | ehci->debug = NULL; |
| 247 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | command |= CMD_RESET; |
| 249 | dbg_cmd (ehci, "reset", command); |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 250 | ehci_writel(ehci, command, &ehci->regs->command); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | ehci_to_hcd(ehci)->state = HC_STATE_HALT; |
| 252 | ehci->next_statechange = jiffies; |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 253 | retval = handshake (ehci, &ehci->regs->command, |
| 254 | CMD_RESET, 0, 250 * 1000); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | |
Alek Du | 331ac6b | 2009-07-13 12:41:20 +0800 | [diff] [blame] | 256 | if (ehci->has_hostpc) { |
| 257 | ehci_writel(ehci, USBMODE_EX_HC | USBMODE_EX_VBPS, |
| 258 | (u32 __iomem *)(((u8 *)ehci->regs) + USBMODE_EX)); |
| 259 | ehci_writel(ehci, TXFIFO_DEFAULT, |
| 260 | (u32 __iomem *)(((u8 *)ehci->regs) + TXFILLTUNING)); |
| 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) |
| 269 | dbgp_external_startup(); |
| 270 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | return retval; |
| 272 | } |
| 273 | |
| 274 | /* idle the controller (from running) */ |
| 275 | static void ehci_quiesce (struct ehci_hcd *ehci) |
| 276 | { |
| 277 | u32 temp; |
| 278 | |
| 279 | #ifdef DEBUG |
| 280 | if (!HC_IS_RUNNING (ehci_to_hcd(ehci)->state)) |
| 281 | BUG (); |
| 282 | #endif |
| 283 | |
| 284 | /* wait for any schedule enables/disables to take effect */ |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 285 | temp = ehci_readl(ehci, &ehci->regs->command) << 10; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | temp &= STS_ASS | STS_PSS; |
Karsten Wiese | c765d4c | 2008-02-16 13:44:42 -0800 | [diff] [blame] | 287 | if (handshake_on_error_set_halt(ehci, &ehci->regs->status, |
| 288 | STS_ASS | STS_PSS, temp, 16 * 125)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | |
| 291 | /* then disable anything that's still active */ |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 292 | temp = ehci_readl(ehci, &ehci->regs->command); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | temp &= ~(CMD_ASE | CMD_IAAD | CMD_PSE); |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 294 | ehci_writel(ehci, temp, &ehci->regs->command); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | |
| 296 | /* hardware can take 16 microframes to turn off ... */ |
Karsten Wiese | c765d4c | 2008-02-16 13:44:42 -0800 | [diff] [blame] | 297 | handshake_on_error_set_halt(ehci, &ehci->regs->status, |
| 298 | 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); |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 304 | static void ehci_work(struct ehci_hcd *ehci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
| 306 | #include "ehci-hub.c" |
| 307 | #include "ehci-mem.c" |
| 308 | #include "ehci-q.c" |
| 309 | #include "ehci-sched.c" |
| 310 | |
| 311 | /*-------------------------------------------------------------------------*/ |
| 312 | |
Alan Stern | 07d29b6 | 2007-12-11 16:05:30 -0500 | [diff] [blame] | 313 | static void ehci_iaa_watchdog(unsigned long param) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | { |
| 315 | struct ehci_hcd *ehci = (struct ehci_hcd *) param; |
| 316 | unsigned long flags; |
| 317 | |
| 318 | spin_lock_irqsave (&ehci->lock, flags); |
| 319 | |
David Brownell | e82cc12 | 2008-03-07 13:49:42 -0800 | [diff] [blame] | 320 | /* Lost IAA irqs wedge things badly; seen first with a vt8235. |
| 321 | * So we need this watchdog, but must protect it against both |
| 322 | * (a) SMP races against real IAA firing and retriggering, and |
| 323 | * (b) clean HC shutdown, when IAA watchdog was pending. |
| 324 | */ |
| 325 | if (ehci->reclaim |
| 326 | && !timer_pending(&ehci->iaa_watchdog) |
| 327 | && HC_IS_RUNNING(ehci_to_hcd(ehci)->state)) { |
| 328 | u32 cmd, status; |
Alan Stern | 07d29b6 | 2007-12-11 16:05:30 -0500 | [diff] [blame] | 329 | |
David Brownell | e82cc12 | 2008-03-07 13:49:42 -0800 | [diff] [blame] | 330 | /* If we get here, IAA is *REALLY* late. It's barely |
| 331 | * conceivable that the system is so busy that CMD_IAAD |
| 332 | * is still legitimately set, so let's be sure it's |
| 333 | * clear before we read STS_IAA. (The HC should clear |
| 334 | * CMD_IAAD when it sets STS_IAA.) |
| 335 | */ |
| 336 | cmd = ehci_readl(ehci, &ehci->regs->command); |
| 337 | if (cmd & CMD_IAAD) |
| 338 | ehci_writel(ehci, cmd & ~CMD_IAAD, |
| 339 | &ehci->regs->command); |
| 340 | |
| 341 | /* If IAA is set here it either legitimately triggered |
| 342 | * before we cleared IAAD above (but _way_ late, so we'll |
| 343 | * still count it as lost) ... or a silicon erratum: |
| 344 | * - VIA seems to set IAA without triggering the IRQ; |
| 345 | * - IAAD potentially cleared without setting IAA. |
| 346 | */ |
| 347 | status = ehci_readl(ehci, &ehci->regs->status); |
| 348 | if ((status & STS_IAA) || !(cmd & CMD_IAAD)) { |
Greg Kroah-Hartman | 64f8979 | 2006-10-17 13:57:18 -0700 | [diff] [blame] | 349 | COUNT (ehci->stats.lost_iaa); |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 350 | ehci_writel(ehci, STS_IAA, &ehci->regs->status); |
Greg Kroah-Hartman | 64f8979 | 2006-10-17 13:57:18 -0700 | [diff] [blame] | 351 | } |
David Brownell | e82cc12 | 2008-03-07 13:49:42 -0800 | [diff] [blame] | 352 | |
| 353 | ehci_vdbg(ehci, "IAA watchdog: status %x cmd %x\n", |
| 354 | status, cmd); |
Alan Stern | 07d29b6 | 2007-12-11 16:05:30 -0500 | [diff] [blame] | 355 | end_unlink_async(ehci); |
Greg Kroah-Hartman | 64f8979 | 2006-10-17 13:57:18 -0700 | [diff] [blame] | 356 | } |
| 357 | |
Alan Stern | 07d29b6 | 2007-12-11 16:05:30 -0500 | [diff] [blame] | 358 | spin_unlock_irqrestore(&ehci->lock, flags); |
| 359 | } |
| 360 | |
| 361 | static void ehci_watchdog(unsigned long param) |
| 362 | { |
| 363 | struct ehci_hcd *ehci = (struct ehci_hcd *) param; |
| 364 | unsigned long flags; |
| 365 | |
| 366 | spin_lock_irqsave(&ehci->lock, flags); |
| 367 | |
| 368 | /* stop async processing after it's idled a bit */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | if (test_bit (TIMER_ASYNC_OFF, &ehci->actions)) |
David Brownell | 26f953f | 2006-09-18 17:03:16 -0700 | [diff] [blame] | 370 | start_unlink_async (ehci, ehci->async); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | |
| 372 | /* ehci could run by timer, without IRQs ... */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 373 | ehci_work (ehci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | |
| 375 | spin_unlock_irqrestore (&ehci->lock, flags); |
| 376 | } |
| 377 | |
Alan Stern | 8903795 | 2007-02-13 14:55:27 -0500 | [diff] [blame] | 378 | /* On some systems, leaving remote wakeup enabled prevents system shutdown. |
| 379 | * The firmware seems to think that powering off is a wakeup event! |
| 380 | * This routine turns off remote wakeup and everything else, on all ports. |
| 381 | */ |
| 382 | static void ehci_turn_off_all_ports(struct ehci_hcd *ehci) |
| 383 | { |
| 384 | int port = HCS_N_PORTS(ehci->hcs_params); |
| 385 | |
| 386 | while (port--) |
| 387 | ehci_writel(ehci, PORT_RWC_BITS, |
| 388 | &ehci->regs->port_status[port]); |
| 389 | } |
| 390 | |
Sarah Sharp | 21da84a | 2008-04-08 14:30:18 -0700 | [diff] [blame] | 391 | /* |
| 392 | * Halt HC, turn off all ports, and let the BIOS use the companion controllers. |
| 393 | * Should be called with ehci->lock held. |
David Brownell | 72f30b6 | 2005-09-27 10:19:39 -0700 | [diff] [blame] | 394 | */ |
Sarah Sharp | 21da84a | 2008-04-08 14:30:18 -0700 | [diff] [blame] | 395 | static void ehci_silence_controller(struct ehci_hcd *ehci) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | { |
Sarah Sharp | 21da84a | 2008-04-08 14:30:18 -0700 | [diff] [blame] | 397 | ehci_halt(ehci); |
Alan Stern | 8903795 | 2007-02-13 14:55:27 -0500 | [diff] [blame] | 398 | ehci_turn_off_all_ports(ehci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | |
| 400 | /* make BIOS/etc use companion controller during reboot */ |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 401 | ehci_writel(ehci, 0, &ehci->regs->configured_flag); |
Alan Stern | 8903795 | 2007-02-13 14:55:27 -0500 | [diff] [blame] | 402 | |
| 403 | /* unblock posted writes */ |
| 404 | ehci_readl(ehci, &ehci->regs->configured_flag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | } |
| 406 | |
Sarah Sharp | 21da84a | 2008-04-08 14:30:18 -0700 | [diff] [blame] | 407 | /* ehci_shutdown kick in for silicon on any bus (not just pci, etc). |
| 408 | * This forcibly disables dma and IRQs, helping kexec and other cases |
| 409 | * where the next system software may expect clean state. |
| 410 | */ |
| 411 | static void ehci_shutdown(struct usb_hcd *hcd) |
| 412 | { |
| 413 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
| 414 | |
| 415 | del_timer_sync(&ehci->watchdog); |
| 416 | del_timer_sync(&ehci->iaa_watchdog); |
| 417 | |
| 418 | spin_lock_irq(&ehci->lock); |
| 419 | ehci_silence_controller(ehci); |
| 420 | spin_unlock_irq(&ehci->lock); |
| 421 | } |
| 422 | |
David Brownell | 56c1e26 | 2005-04-09 09:00:29 -0700 | [diff] [blame] | 423 | static void ehci_port_power (struct ehci_hcd *ehci, int is_on) |
| 424 | { |
| 425 | unsigned port; |
| 426 | |
| 427 | if (!HCS_PPC (ehci->hcs_params)) |
| 428 | return; |
| 429 | |
| 430 | ehci_dbg (ehci, "...power%s ports...\n", is_on ? "up" : "down"); |
| 431 | for (port = HCS_N_PORTS (ehci->hcs_params); port > 0; ) |
| 432 | (void) ehci_hub_control(ehci_to_hcd(ehci), |
| 433 | is_on ? SetPortFeature : ClearPortFeature, |
| 434 | USB_PORT_FEAT_POWER, |
| 435 | port--, NULL, 0); |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 436 | /* Flush those writes */ |
| 437 | ehci_readl(ehci, &ehci->regs->command); |
David Brownell | 56c1e26 | 2005-04-09 09:00:29 -0700 | [diff] [blame] | 438 | msleep(20); |
| 439 | } |
| 440 | |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 441 | /*-------------------------------------------------------------------------*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 443 | /* |
| 444 | * ehci_work is called from some interrupts, timers, and so on. |
| 445 | * it calls driver completion functions, after dropping ehci->lock. |
| 446 | */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 447 | static void ehci_work (struct ehci_hcd *ehci) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | { |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 449 | timer_action_done (ehci, TIMER_IO_WATCHDOG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 451 | /* another CPU may drop ehci->lock during a schedule scan while |
| 452 | * it reports urb completions. this flag guards against bogus |
| 453 | * attempts at re-entrant schedule scanning. |
| 454 | */ |
| 455 | if (ehci->scanning) |
| 456 | return; |
| 457 | ehci->scanning = 1; |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 458 | scan_async (ehci); |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 459 | if (ehci->next_uframe != -1) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 460 | scan_periodic (ehci); |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 461 | ehci->scanning = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 463 | /* the IO watchdog guards against hardware or driver bugs that |
| 464 | * misplace IRQs, and should let us run completely without IRQs. |
| 465 | * such lossage has been observed on both VT6202 and VT8235. |
| 466 | */ |
| 467 | if (HC_IS_RUNNING (ehci_to_hcd(ehci)->state) && |
| 468 | (ehci->async->qh_next.ptr != NULL || |
| 469 | ehci->periodic_sched != 0)) |
| 470 | timer_action (ehci, TIMER_IO_WATCHDOG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | } |
| 472 | |
Sarah Sharp | 21da84a | 2008-04-08 14:30:18 -0700 | [diff] [blame] | 473 | /* |
| 474 | * Called when the ehci_hcd module is removed. |
| 475 | */ |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 476 | static void ehci_stop (struct usb_hcd *hcd) |
| 477 | { |
| 478 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
| 479 | |
| 480 | ehci_dbg (ehci, "stop\n"); |
| 481 | |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 482 | /* no more interrupts ... */ |
| 483 | del_timer_sync (&ehci->watchdog); |
Alan Stern | 07d29b6 | 2007-12-11 16:05:30 -0500 | [diff] [blame] | 484 | del_timer_sync(&ehci->iaa_watchdog); |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 485 | |
| 486 | spin_lock_irq(&ehci->lock); |
| 487 | if (HC_IS_RUNNING (hcd->state)) |
| 488 | ehci_quiesce (ehci); |
| 489 | |
Sarah Sharp | 21da84a | 2008-04-08 14:30:18 -0700 | [diff] [blame] | 490 | ehci_silence_controller(ehci); |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 491 | ehci_reset (ehci); |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 492 | spin_unlock_irq(&ehci->lock); |
| 493 | |
Alan Stern | 57e06c1 | 2007-01-16 11:59:45 -0500 | [diff] [blame] | 494 | remove_companion_file(ehci); |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 495 | remove_debug_files (ehci); |
| 496 | |
| 497 | /* root hub is shut down separately (first, when possible) */ |
| 498 | spin_lock_irq (&ehci->lock); |
| 499 | if (ehci->async) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 500 | ehci_work (ehci); |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 501 | spin_unlock_irq (&ehci->lock); |
| 502 | ehci_mem_cleanup (ehci); |
| 503 | |
| 504 | #ifdef EHCI_STATS |
| 505 | ehci_dbg (ehci, "irq normal %ld err %ld reclaim %ld (lost %ld)\n", |
| 506 | ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim, |
| 507 | ehci->stats.lost_iaa); |
| 508 | ehci_dbg (ehci, "complete %ld unlink %ld\n", |
| 509 | ehci->stats.complete, ehci->stats.unlink); |
| 510 | #endif |
| 511 | |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 512 | dbg_status (ehci, "ehci_stop completed", |
| 513 | ehci_readl(ehci, &ehci->regs->status)); |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 514 | } |
| 515 | |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 516 | /* one-time init, only for memory state */ |
| 517 | static int ehci_init(struct usb_hcd *hcd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | { |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 519 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | u32 temp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | int retval; |
| 522 | u32 hcc_params; |
Alek Du | 3807e26 | 2009-07-14 07:23:29 +0800 | [diff] [blame] | 523 | struct ehci_qh_hw *hw; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 525 | spin_lock_init(&ehci->lock); |
| 526 | |
Alek Du | 403dbd3 | 2009-07-13 17:30:41 +0800 | [diff] [blame] | 527 | /* |
| 528 | * keep io watchdog by default, those good HCDs could turn off it later |
| 529 | */ |
| 530 | ehci->need_io_watchdog = 1; |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 531 | init_timer(&ehci->watchdog); |
| 532 | ehci->watchdog.function = ehci_watchdog; |
| 533 | ehci->watchdog.data = (unsigned long) ehci; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | |
Alan Stern | 07d29b6 | 2007-12-11 16:05:30 -0500 | [diff] [blame] | 535 | init_timer(&ehci->iaa_watchdog); |
| 536 | ehci->iaa_watchdog.function = ehci_iaa_watchdog; |
| 537 | ehci->iaa_watchdog.data = (unsigned long) ehci; |
| 538 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | /* |
| 540 | * hw default: 1K periodic list heads, one per frame. |
| 541 | * periodic_size can shrink by USBCMD update if hcc_params allows. |
| 542 | */ |
| 543 | ehci->periodic_size = DEFAULT_I_TDPS; |
Karsten Wiese | 9aa09d2 | 2009-02-08 16:07:58 -0800 | [diff] [blame] | 544 | INIT_LIST_HEAD(&ehci->cached_itd_list); |
Alan Stern | 0e5f231 | 2010-04-08 16:56:37 -0400 | [diff] [blame] | 545 | INIT_LIST_HEAD(&ehci->cached_sitd_list); |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 546 | if ((retval = ehci_mem_init(ehci, GFP_KERNEL)) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | return retval; |
| 548 | |
| 549 | /* controllers may cache some of the periodic schedule ... */ |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 550 | hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params); |
David Brownell | 53bd6a6 | 2006-08-30 14:50:06 -0700 | [diff] [blame] | 551 | if (HCC_ISOC_CACHE(hcc_params)) // full frame cache |
Sarah Sharp | dccd574 | 2009-10-27 10:55:05 -0700 | [diff] [blame] | 552 | ehci->i_thresh = 2 + 8; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | else // N microframes cached |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 554 | ehci->i_thresh = 2 + HCC_ISOC_THRES(hcc_params); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | |
| 556 | ehci->reclaim = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | ehci->next_uframe = -1; |
Karsten Wiese | 9aa09d2 | 2009-02-08 16:07:58 -0800 | [diff] [blame] | 558 | ehci->clock_frame = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | /* |
| 561 | * dedicate a qh for the async ring head, since we couldn't unlink |
| 562 | * a 'real' qh without stopping the async schedule [4.8]. use it |
| 563 | * as the 'reclamation list head' too. |
| 564 | * its dummy is used in hw_alt_next of many tds, to prevent the qh |
| 565 | * from automatically advancing to the next td after short reads. |
| 566 | */ |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 567 | ehci->async->qh_next.qh = NULL; |
Alek Du | 3807e26 | 2009-07-14 07:23:29 +0800 | [diff] [blame] | 568 | hw = ehci->async->hw; |
| 569 | hw->hw_next = QH_NEXT(ehci, ehci->async->qh_dma); |
| 570 | hw->hw_info1 = cpu_to_hc32(ehci, QH_HEAD); |
| 571 | hw->hw_token = cpu_to_hc32(ehci, QTD_STS_HALT); |
| 572 | hw->hw_qtd_next = EHCI_LIST_END(ehci); |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 573 | ehci->async->qh_state = QH_STATE_LINKED; |
Alek Du | 3807e26 | 2009-07-14 07:23:29 +0800 | [diff] [blame] | 574 | hw->hw_alt_next = QTD_NEXT(ehci, ehci->async->dummy->qtd_dma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | |
| 576 | /* clear interrupt enables, set irq latency */ |
| 577 | if (log2_irq_thresh < 0 || log2_irq_thresh > 6) |
| 578 | log2_irq_thresh = 0; |
| 579 | temp = 1 << (16 + log2_irq_thresh); |
| 580 | if (HCC_CANPARK(hcc_params)) { |
| 581 | /* HW default park == 3, on hardware that supports it (like |
| 582 | * NVidia and ALI silicon), maximizes throughput on the async |
| 583 | * schedule by avoiding QH fetches between transfers. |
| 584 | * |
| 585 | * With fast usb storage devices and NForce2, "park" seems to |
| 586 | * make problems: throughput reduction (!), data errors... |
| 587 | */ |
| 588 | if (park) { |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 589 | park = min(park, (unsigned) 3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | temp |= CMD_PARK; |
| 591 | temp |= park << 8; |
| 592 | } |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 593 | ehci_dbg(ehci, "park %d\n", park); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | } |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 595 | if (HCC_PGM_FRAMELISTLEN(hcc_params)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | /* periodic schedule size can be smaller than default */ |
| 597 | temp &= ~(3 << 2); |
| 598 | temp |= (EHCI_TUNE_FLS << 2); |
| 599 | switch (EHCI_TUNE_FLS) { |
| 600 | case 0: ehci->periodic_size = 1024; break; |
| 601 | case 1: ehci->periodic_size = 512; break; |
| 602 | case 2: ehci->periodic_size = 256; break; |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 603 | default: BUG(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | } |
| 605 | } |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 606 | ehci->command = temp; |
| 607 | |
Alan Stern | 40f8db8 | 2009-11-06 12:29:40 -0500 | [diff] [blame] | 608 | /* Accept arbitrarily long scatter-gather lists */ |
| 609 | hcd->self.sg_tablesize = ~0; |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 610 | return 0; |
| 611 | } |
| 612 | |
| 613 | /* start HC running; it's halted, ehci_init() has been run (once) */ |
| 614 | static int ehci_run (struct usb_hcd *hcd) |
| 615 | { |
| 616 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
| 617 | int retval; |
| 618 | u32 temp; |
| 619 | u32 hcc_params; |
| 620 | |
Marcelo Tosatti | 1d619f1 | 2007-01-21 19:45:59 -0200 | [diff] [blame] | 621 | hcd->uses_new_polling = 1; |
| 622 | hcd->poll_rh = 0; |
| 623 | |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 624 | /* EHCI spec section 4.1 */ |
| 625 | if ((retval = ehci_reset(ehci)) != 0) { |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 626 | ehci_mem_cleanup(ehci); |
| 627 | return retval; |
| 628 | } |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 629 | ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); |
| 630 | ehci_writel(ehci, (u32)ehci->async->qh_dma, &ehci->regs->async_next); |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 631 | |
| 632 | /* |
| 633 | * hcc_params controls whether ehci->regs->segment must (!!!) |
| 634 | * be used; it constrains QH/ITD/SITD and QTD locations. |
| 635 | * pci_pool consistent memory always uses segment zero. |
| 636 | * streaming mappings for I/O buffers, like pci_map_single(), |
| 637 | * can return segments above 4GB, if the device allows. |
| 638 | * |
| 639 | * NOTE: the dma mask is visible through dma_supported(), so |
| 640 | * drivers can pass this info along ... like NETIF_F_HIGHDMA, |
| 641 | * Scsi_Host.highmem_io, and so forth. It's readonly to all |
| 642 | * host side drivers though. |
| 643 | */ |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 644 | hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params); |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 645 | if (HCC_64BIT_ADDR(hcc_params)) { |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 646 | ehci_writel(ehci, 0, &ehci->regs->segment); |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 647 | #if 0 |
| 648 | // this is deeply broken on almost all architectures |
Yang Hongyang | 6a35528 | 2009-04-06 19:01:13 -0700 | [diff] [blame] | 649 | if (!dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64))) |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 650 | ehci_info(ehci, "enabled 64bit DMA\n"); |
| 651 | #endif |
| 652 | } |
| 653 | |
| 654 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | // Philips, Intel, and maybe others need CMD_RUN before the |
| 656 | // root hub will detect new devices (why?); NEC doesn't |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 657 | ehci->command &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET); |
| 658 | ehci->command |= CMD_RUN; |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 659 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 660 | dbg_cmd (ehci, "init", ehci->command); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | /* |
| 663 | * Start, enabling full USB 2.0 functionality ... usb 1.1 devices |
| 664 | * are explicitly handed to companion controller(s), so no TT is |
| 665 | * involved with the root hub. (Except where one is integrated, |
| 666 | * and there's no companion controller unless maybe for USB OTG.) |
Alan Stern | 32fe019 | 2007-10-10 16:27:07 -0400 | [diff] [blame] | 667 | * |
| 668 | * Turning on the CF flag will transfer ownership of all ports |
| 669 | * from the companions to the EHCI controller. If any of the |
| 670 | * companions are in the middle of a port reset at the time, it |
| 671 | * could cause trouble. Write-locking ehci_cf_port_reset_rwsem |
David Brownell | 1cb5265 | 2007-11-13 16:22:30 -0800 | [diff] [blame] | 672 | * guarantees that no resets are in progress. After we set CF, |
| 673 | * a short delay lets the hardware catch up; new resets shouldn't |
| 674 | * be started before the port switching actions could complete. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | */ |
Alan Stern | 32fe019 | 2007-10-10 16:27:07 -0400 | [diff] [blame] | 676 | down_write(&ehci_cf_port_reset_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | hcd->state = HC_STATE_RUNNING; |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 678 | ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag); |
| 679 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ |
David Brownell | 1cb5265 | 2007-11-13 16:22:30 -0800 | [diff] [blame] | 680 | msleep(5); |
Alan Stern | 32fe019 | 2007-10-10 16:27:07 -0400 | [diff] [blame] | 681 | up_write(&ehci_cf_port_reset_rwsem); |
Oliver Neukum | ee4ecb8 | 2009-11-27 15:17:59 +0100 | [diff] [blame] | 682 | ehci->last_periodic_enable = ktime_get_real(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 684 | temp = HC_VERSION(ehci_readl(ehci, &ehci->caps->hc_capbase)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | ehci_info (ehci, |
Alan Stern | 2b70f07 | 2008-10-02 11:47:15 -0400 | [diff] [blame] | 686 | "USB %x.%x started, EHCI %x.%02x%s\n", |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 687 | ((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f), |
Alan Stern | 2b70f07 | 2008-10-02 11:47:15 -0400 | [diff] [blame] | 688 | temp >> 8, temp & 0xff, |
David Brownell | 93f1a47 | 2006-11-16 23:34:58 -0800 | [diff] [blame] | 689 | ignore_oc ? ", overcurrent ignored" : ""); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 691 | ehci_writel(ehci, INTR_MASK, |
| 692 | &ehci->regs->intr_enable); /* Turn On Interrupts */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 694 | /* GRR this is run-once init(), being done every time the HC starts. |
| 695 | * So long as they're part of class devices, we can't do it init() |
| 696 | * since the class device isn't created that early. |
| 697 | */ |
| 698 | create_debug_files(ehci); |
Alan Stern | 57e06c1 | 2007-01-16 11:59:45 -0500 | [diff] [blame] | 699 | create_companion_file(ehci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | |
| 701 | return 0; |
| 702 | } |
| 703 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | /*-------------------------------------------------------------------------*/ |
| 705 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 706 | static irqreturn_t ehci_irq (struct usb_hcd *hcd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | { |
| 708 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
Alan Stern | 67b2e02 | 2008-11-12 17:04:53 -0500 | [diff] [blame] | 709 | u32 status, masked_status, pcd_status = 0, cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | int bh; |
| 711 | |
| 712 | spin_lock (&ehci->lock); |
| 713 | |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 714 | status = ehci_readl(ehci, &ehci->regs->status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | |
| 716 | /* e.g. cardbus physical eject */ |
| 717 | if (status == ~(u32) 0) { |
| 718 | ehci_dbg (ehci, "device removed\n"); |
| 719 | goto dead; |
| 720 | } |
| 721 | |
Alan Stern | 67b2e02 | 2008-11-12 17:04:53 -0500 | [diff] [blame] | 722 | masked_status = status & INTR_MASK; |
| 723 | if (!masked_status) { /* irq sharing? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | spin_unlock(&ehci->lock); |
| 725 | return IRQ_NONE; |
| 726 | } |
| 727 | |
| 728 | /* clear (just) interrupts */ |
Alan Stern | 67b2e02 | 2008-11-12 17:04:53 -0500 | [diff] [blame] | 729 | ehci_writel(ehci, masked_status, &ehci->regs->status); |
David Brownell | e82cc12 | 2008-03-07 13:49:42 -0800 | [diff] [blame] | 730 | cmd = ehci_readl(ehci, &ehci->regs->command); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | bh = 0; |
| 732 | |
David Brownell | 9776afc | 2008-02-01 11:42:05 -0800 | [diff] [blame] | 733 | #ifdef VERBOSE_DEBUG |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | /* unrequested/ignored: Frame List Rollover */ |
| 735 | dbg_status (ehci, "irq", status); |
| 736 | #endif |
| 737 | |
| 738 | /* INT, ERR, and IAA interrupt rates can be throttled */ |
| 739 | |
| 740 | /* normal [4.15.1.2] or error [4.15.1.1] completion */ |
| 741 | if (likely ((status & (STS_INT|STS_ERR)) != 0)) { |
| 742 | if (likely ((status & STS_ERR) == 0)) |
| 743 | COUNT (ehci->stats.normal); |
| 744 | else |
| 745 | COUNT (ehci->stats.error); |
| 746 | bh = 1; |
| 747 | } |
| 748 | |
| 749 | /* complete the unlinking of some qh [4.15.2.3] */ |
| 750 | if (status & STS_IAA) { |
David Brownell | e82cc12 | 2008-03-07 13:49:42 -0800 | [diff] [blame] | 751 | /* guard against (alleged) silicon errata */ |
| 752 | if (cmd & CMD_IAAD) { |
| 753 | ehci_writel(ehci, cmd & ~CMD_IAAD, |
| 754 | &ehci->regs->command); |
| 755 | ehci_dbg(ehci, "IAA with IAAD still set?\n"); |
| 756 | } |
| 757 | if (ehci->reclaim) { |
| 758 | COUNT(ehci->stats.reclaim); |
| 759 | end_unlink_async(ehci); |
| 760 | } else |
| 761 | ehci_dbg(ehci, "IAA with nothing to reclaim?\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | } |
| 763 | |
| 764 | /* remote wakeup [4.3.1] */ |
David Brownell | d97cc2f | 2005-12-22 17:05:18 -0800 | [diff] [blame] | 765 | if (status & STS_PCD) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | unsigned i = HCS_N_PORTS (ehci->hcs_params); |
David Brownell | d1b1842 | 2008-03-05 23:37:52 -0800 | [diff] [blame] | 767 | |
| 768 | /* kick root hub later */ |
Marcelo Tosatti | 1d619f1 | 2007-01-21 19:45:59 -0200 | [diff] [blame] | 769 | pcd_status = status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | |
| 771 | /* resume root hub? */ |
Alan Stern | eafe5b9 | 2008-10-06 11:25:53 -0400 | [diff] [blame] | 772 | if (!(cmd & CMD_RUN)) |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 773 | usb_hcd_resume_root_hub(hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | |
| 775 | while (i--) { |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 776 | int pstatus = ehci_readl(ehci, |
| 777 | &ehci->regs->port_status [i]); |
David Brownell | b972b68 | 2006-06-30 02:34:42 -0700 | [diff] [blame] | 778 | |
| 779 | if (pstatus & PORT_OWNER) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | continue; |
Alan Stern | eafe5b9 | 2008-10-06 11:25:53 -0400 | [diff] [blame] | 781 | if (!(test_bit(i, &ehci->suspended_ports) && |
| 782 | ((pstatus & PORT_RESUME) || |
| 783 | !(pstatus & PORT_SUSPEND)) && |
| 784 | (pstatus & PORT_PE) && |
| 785 | ehci->reset_done[i] == 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | continue; |
| 787 | |
| 788 | /* start 20 msec resume signaling from this port, |
| 789 | * and make khubd collect PORT_STAT_C_SUSPEND to |
Alan Stern | 49d0f07 | 2010-01-08 11:18:38 -0500 | [diff] [blame] | 790 | * stop that signaling. Use 5 ms extra for safety, |
| 791 | * like usb_port_resume() does. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | */ |
Alan Stern | 49d0f07 | 2010-01-08 11:18:38 -0500 | [diff] [blame] | 793 | ehci->reset_done[i] = jiffies + msecs_to_jiffies(25); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | ehci_dbg (ehci, "port %d remote wakeup\n", i + 1); |
Alan Stern | 61e8b85 | 2007-04-09 11:52:31 -0400 | [diff] [blame] | 795 | mod_timer(&hcd->rh_timer, ehci->reset_done[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | } |
| 797 | } |
| 798 | |
| 799 | /* PCI errors [4.15.2.4] */ |
| 800 | if (unlikely ((status & STS_FATAL) != 0)) { |
Alan Stern | 67b2e02 | 2008-11-12 17:04:53 -0500 | [diff] [blame] | 801 | ehci_err(ehci, "fatal error\n"); |
Alan Stern | eafe5b9 | 2008-10-06 11:25:53 -0400 | [diff] [blame] | 802 | dbg_cmd(ehci, "fatal", cmd); |
| 803 | dbg_status(ehci, "fatal", status); |
Alan Stern | 67b2e02 | 2008-11-12 17:04:53 -0500 | [diff] [blame] | 804 | ehci_halt(ehci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | dead: |
Alan Stern | 67b2e02 | 2008-11-12 17:04:53 -0500 | [diff] [blame] | 806 | ehci_reset(ehci); |
| 807 | ehci_writel(ehci, 0, &ehci->regs->configured_flag); |
| 808 | /* generic layer kills/unlinks all urbs, then |
| 809 | * uses ehci_stop to clean up the rest |
| 810 | */ |
| 811 | bh = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | } |
| 813 | |
| 814 | if (bh) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 815 | ehci_work (ehci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | spin_unlock (&ehci->lock); |
David Brownell | d1b1842 | 2008-03-05 23:37:52 -0800 | [diff] [blame] | 817 | if (pcd_status) |
Marcelo Tosatti | 1d619f1 | 2007-01-21 19:45:59 -0200 | [diff] [blame] | 818 | usb_hcd_poll_rh_status(hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | return IRQ_HANDLED; |
| 820 | } |
| 821 | |
| 822 | /*-------------------------------------------------------------------------*/ |
| 823 | |
| 824 | /* |
| 825 | * non-error returns are a promise to giveback() the urb later |
| 826 | * we drop ownership so next owner (or urb unlink) can get it |
| 827 | * |
| 828 | * urb + dev is in hcd.self.controller.urb_list |
| 829 | * we're queueing TDs onto software and hardware lists |
| 830 | * |
| 831 | * hcd-specific init for hcpriv hasn't been done yet |
| 832 | * |
| 833 | * NOTE: control, bulk, and interrupt share the same code to append TDs |
| 834 | * to a (possibly active) QH, and the same QH scanning code. |
| 835 | */ |
| 836 | static int ehci_urb_enqueue ( |
| 837 | struct usb_hcd *hcd, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | struct urb *urb, |
Al Viro | 55016f1 | 2005-10-21 03:21:58 -0400 | [diff] [blame] | 839 | gfp_t mem_flags |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | ) { |
| 841 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
| 842 | struct list_head qtd_list; |
| 843 | |
| 844 | INIT_LIST_HEAD (&qtd_list); |
| 845 | |
| 846 | switch (usb_pipetype (urb->pipe)) { |
David Brownell | 25b70a8 | 2008-03-04 15:11:07 -0800 | [diff] [blame] | 847 | case PIPE_CONTROL: |
| 848 | /* qh_completions() code doesn't handle all the fault cases |
| 849 | * in multi-TD control transfers. Even 1KB is rare anyway. |
| 850 | */ |
| 851 | if (urb->transfer_buffer_length > (16 * 1024)) |
| 852 | return -EMSGSIZE; |
| 853 | /* FALLTHROUGH */ |
| 854 | /* case PIPE_BULK: */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | default: |
| 856 | if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags)) |
| 857 | return -ENOMEM; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 858 | return submit_async(ehci, urb, &qtd_list, mem_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | |
| 860 | case PIPE_INTERRUPT: |
| 861 | if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags)) |
| 862 | return -ENOMEM; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 863 | return intr_submit(ehci, urb, &qtd_list, mem_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | |
| 865 | case PIPE_ISOCHRONOUS: |
| 866 | if (urb->dev->speed == USB_SPEED_HIGH) |
| 867 | return itd_submit (ehci, urb, mem_flags); |
| 868 | else |
| 869 | return sitd_submit (ehci, urb, mem_flags); |
| 870 | } |
| 871 | } |
| 872 | |
| 873 | static void unlink_async (struct ehci_hcd *ehci, struct ehci_qh *qh) |
| 874 | { |
Alan Stern | 07d29b6 | 2007-12-11 16:05:30 -0500 | [diff] [blame] | 875 | /* failfast */ |
David Brownell | e82cc12 | 2008-03-07 13:49:42 -0800 | [diff] [blame] | 876 | if (!HC_IS_RUNNING(ehci_to_hcd(ehci)->state) && ehci->reclaim) |
Alan Stern | 07d29b6 | 2007-12-11 16:05:30 -0500 | [diff] [blame] | 877 | end_unlink_async(ehci); |
| 878 | |
Alan Stern | 3a44494 | 2009-08-19 12:22:06 -0400 | [diff] [blame] | 879 | /* If the QH isn't linked then there's nothing we can do |
| 880 | * unless we were called during a giveback, in which case |
| 881 | * qh_completions() has to deal with it. |
| 882 | */ |
| 883 | if (qh->qh_state != QH_STATE_LINKED) { |
| 884 | if (qh->qh_state == QH_STATE_COMPLETING) |
| 885 | qh->needs_rescan = 1; |
| 886 | return; |
| 887 | } |
Alan Stern | 07d29b6 | 2007-12-11 16:05:30 -0500 | [diff] [blame] | 888 | |
| 889 | /* defer till later if busy */ |
Alan Stern | 3a44494 | 2009-08-19 12:22:06 -0400 | [diff] [blame] | 890 | if (ehci->reclaim) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | struct ehci_qh *last; |
| 892 | |
| 893 | for (last = ehci->reclaim; |
| 894 | last->reclaim; |
| 895 | last = last->reclaim) |
| 896 | continue; |
| 897 | qh->qh_state = QH_STATE_UNLINK_WAIT; |
| 898 | last->reclaim = qh; |
| 899 | |
Alan Stern | 07d29b6 | 2007-12-11 16:05:30 -0500 | [diff] [blame] | 900 | /* start IAA cycle */ |
| 901 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | start_unlink_async (ehci, qh); |
| 903 | } |
| 904 | |
| 905 | /* remove from hardware lists |
| 906 | * completions normally happen asynchronously |
| 907 | */ |
| 908 | |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 909 | 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] | 910 | { |
| 911 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
| 912 | struct ehci_qh *qh; |
| 913 | unsigned long flags; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 914 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | |
| 916 | spin_lock_irqsave (&ehci->lock, flags); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 917 | rc = usb_hcd_check_unlink_urb(hcd, urb, status); |
| 918 | if (rc) |
| 919 | goto done; |
| 920 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | switch (usb_pipetype (urb->pipe)) { |
| 922 | // case PIPE_CONTROL: |
| 923 | // case PIPE_BULK: |
| 924 | default: |
| 925 | qh = (struct ehci_qh *) urb->hcpriv; |
| 926 | if (!qh) |
| 927 | break; |
Alan Stern | 07d29b6 | 2007-12-11 16:05:30 -0500 | [diff] [blame] | 928 | switch (qh->qh_state) { |
| 929 | case QH_STATE_LINKED: |
| 930 | case QH_STATE_COMPLETING: |
| 931 | unlink_async(ehci, qh); |
| 932 | break; |
| 933 | case QH_STATE_UNLINK: |
| 934 | case QH_STATE_UNLINK_WAIT: |
| 935 | /* already started */ |
| 936 | break; |
| 937 | case QH_STATE_IDLE: |
Alan Stern | 7a0f0d9 | 2009-07-31 10:40:22 -0400 | [diff] [blame] | 938 | /* QH might be waiting for a Clear-TT-Buffer */ |
| 939 | qh_completions(ehci, qh); |
Alan Stern | 07d29b6 | 2007-12-11 16:05:30 -0500 | [diff] [blame] | 940 | break; |
| 941 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | break; |
| 943 | |
| 944 | case PIPE_INTERRUPT: |
| 945 | qh = (struct ehci_qh *) urb->hcpriv; |
| 946 | if (!qh) |
| 947 | break; |
| 948 | switch (qh->qh_state) { |
| 949 | case QH_STATE_LINKED: |
Alan Stern | a448c9d | 2009-08-19 12:22:44 -0400 | [diff] [blame] | 950 | case QH_STATE_COMPLETING: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | intr_deschedule (ehci, qh); |
Alan Stern | a448c9d | 2009-08-19 12:22:44 -0400 | [diff] [blame] | 952 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | case QH_STATE_IDLE: |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 954 | qh_completions (ehci, qh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | break; |
| 956 | default: |
| 957 | ehci_dbg (ehci, "bogus qh %p state %d\n", |
| 958 | qh, qh->qh_state); |
| 959 | goto done; |
| 960 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | break; |
| 962 | |
| 963 | case PIPE_ISOCHRONOUS: |
| 964 | // itd or sitd ... |
| 965 | |
| 966 | // wait till next completion, do it then. |
| 967 | // completion irqs can wait up to 1024 msec, |
| 968 | break; |
| 969 | } |
| 970 | done: |
| 971 | spin_unlock_irqrestore (&ehci->lock, flags); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 972 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | } |
| 974 | |
| 975 | /*-------------------------------------------------------------------------*/ |
| 976 | |
| 977 | // bulk qh holds the data toggle |
| 978 | |
| 979 | static void |
| 980 | ehci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep) |
| 981 | { |
| 982 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
| 983 | unsigned long flags; |
| 984 | struct ehci_qh *qh, *tmp; |
| 985 | |
| 986 | /* ASSERT: any requests/urbs are being unlinked */ |
| 987 | /* ASSERT: nobody can be submitting urbs for this any more */ |
| 988 | |
| 989 | rescan: |
| 990 | spin_lock_irqsave (&ehci->lock, flags); |
| 991 | qh = ep->hcpriv; |
| 992 | if (!qh) |
| 993 | goto done; |
| 994 | |
| 995 | /* endpoints can be iso streams. for now, we don't |
| 996 | * accelerate iso completions ... so spin a while. |
| 997 | */ |
Clemens Ladisch | 1082f57 | 2010-03-01 17:18:56 +0100 | [diff] [blame] | 998 | if (qh->hw == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | ehci_vdbg (ehci, "iso delay\n"); |
| 1000 | goto idle_timeout; |
| 1001 | } |
| 1002 | |
| 1003 | if (!HC_IS_RUNNING (hcd->state)) |
| 1004 | qh->qh_state = QH_STATE_IDLE; |
| 1005 | switch (qh->qh_state) { |
| 1006 | case QH_STATE_LINKED: |
Alan Stern | 3a44494 | 2009-08-19 12:22:06 -0400 | [diff] [blame] | 1007 | case QH_STATE_COMPLETING: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | for (tmp = ehci->async->qh_next.qh; |
| 1009 | tmp && tmp != qh; |
| 1010 | tmp = tmp->qh_next.qh) |
| 1011 | continue; |
| 1012 | /* periodic qh self-unlinks on empty */ |
| 1013 | if (!tmp) |
| 1014 | goto nogood; |
| 1015 | unlink_async (ehci, qh); |
| 1016 | /* FALL THROUGH */ |
| 1017 | case QH_STATE_UNLINK: /* wait for hw to finish? */ |
Alan Stern | 07d29b6 | 2007-12-11 16:05:30 -0500 | [diff] [blame] | 1018 | case QH_STATE_UNLINK_WAIT: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | idle_timeout: |
| 1020 | spin_unlock_irqrestore (&ehci->lock, flags); |
Nishanth Aravamudan | 22c4386 | 2005-08-15 11:30:11 -0700 | [diff] [blame] | 1021 | schedule_timeout_uninterruptible(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | goto rescan; |
| 1023 | case QH_STATE_IDLE: /* fully unlinked */ |
Alan Stern | 914b701 | 2009-06-29 10:47:30 -0400 | [diff] [blame] | 1024 | if (qh->clearing_tt) |
| 1025 | goto idle_timeout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | if (list_empty (&qh->qtd_list)) { |
| 1027 | qh_put (qh); |
| 1028 | break; |
| 1029 | } |
| 1030 | /* else FALL THROUGH */ |
| 1031 | default: |
| 1032 | nogood: |
| 1033 | /* caller was supposed to have unlinked any requests; |
| 1034 | * that's not our job. just leak this memory. |
| 1035 | */ |
| 1036 | ehci_err (ehci, "qh %p (#%02x) state %d%s\n", |
| 1037 | qh, ep->desc.bEndpointAddress, qh->qh_state, |
| 1038 | list_empty (&qh->qtd_list) ? "" : "(has tds)"); |
| 1039 | break; |
| 1040 | } |
| 1041 | ep->hcpriv = NULL; |
| 1042 | done: |
| 1043 | spin_unlock_irqrestore (&ehci->lock, flags); |
| 1044 | return; |
| 1045 | } |
| 1046 | |
Alan Stern | b18ffd4 | 2009-05-27 18:21:56 -0400 | [diff] [blame] | 1047 | static void |
| 1048 | ehci_endpoint_reset(struct usb_hcd *hcd, struct usb_host_endpoint *ep) |
| 1049 | { |
| 1050 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
| 1051 | struct ehci_qh *qh; |
| 1052 | int eptype = usb_endpoint_type(&ep->desc); |
Alan Stern | a455212d | 2009-06-11 14:56:22 -0400 | [diff] [blame] | 1053 | int epnum = usb_endpoint_num(&ep->desc); |
| 1054 | int is_out = usb_endpoint_dir_out(&ep->desc); |
| 1055 | unsigned long flags; |
Alan Stern | b18ffd4 | 2009-05-27 18:21:56 -0400 | [diff] [blame] | 1056 | |
| 1057 | if (eptype != USB_ENDPOINT_XFER_BULK && eptype != USB_ENDPOINT_XFER_INT) |
| 1058 | return; |
| 1059 | |
Alan Stern | a455212d | 2009-06-11 14:56:22 -0400 | [diff] [blame] | 1060 | spin_lock_irqsave(&ehci->lock, flags); |
Alan Stern | b18ffd4 | 2009-05-27 18:21:56 -0400 | [diff] [blame] | 1061 | qh = ep->hcpriv; |
| 1062 | |
| 1063 | /* For Bulk and Interrupt endpoints we maintain the toggle state |
| 1064 | * in the hardware; the toggle bits in udev aren't used at all. |
| 1065 | * When an endpoint is reset by usb_clear_halt() we must reset |
| 1066 | * the toggle bit in the QH. |
| 1067 | */ |
| 1068 | if (qh) { |
Alan Stern | a455212d | 2009-06-11 14:56:22 -0400 | [diff] [blame] | 1069 | usb_settoggle(qh->dev, epnum, is_out, 0); |
Alan Stern | b18ffd4 | 2009-05-27 18:21:56 -0400 | [diff] [blame] | 1070 | if (!list_empty(&qh->qtd_list)) { |
| 1071 | WARN_ONCE(1, "clear_halt for a busy endpoint\n"); |
Alan Stern | 3a44494 | 2009-08-19 12:22:06 -0400 | [diff] [blame] | 1072 | } else if (qh->qh_state == QH_STATE_LINKED || |
| 1073 | qh->qh_state == QH_STATE_COMPLETING) { |
Alan Stern | a455212d | 2009-06-11 14:56:22 -0400 | [diff] [blame] | 1074 | |
| 1075 | /* The toggle value in the QH can't be updated |
| 1076 | * while the QH is active. Unlink it now; |
| 1077 | * re-linking will call qh_refresh(). |
Alan Stern | b18ffd4 | 2009-05-27 18:21:56 -0400 | [diff] [blame] | 1078 | */ |
Alan Stern | a448c9d | 2009-08-19 12:22:44 -0400 | [diff] [blame] | 1079 | if (eptype == USB_ENDPOINT_XFER_BULK) |
Alan Stern | a455212d | 2009-06-11 14:56:22 -0400 | [diff] [blame] | 1080 | unlink_async(ehci, qh); |
Alan Stern | a448c9d | 2009-08-19 12:22:44 -0400 | [diff] [blame] | 1081 | else |
Alan Stern | a455212d | 2009-06-11 14:56:22 -0400 | [diff] [blame] | 1082 | intr_deschedule(ehci, qh); |
Alan Stern | b18ffd4 | 2009-05-27 18:21:56 -0400 | [diff] [blame] | 1083 | } |
| 1084 | } |
Alan Stern | a455212d | 2009-06-11 14:56:22 -0400 | [diff] [blame] | 1085 | spin_unlock_irqrestore(&ehci->lock, flags); |
Alan Stern | b18ffd4 | 2009-05-27 18:21:56 -0400 | [diff] [blame] | 1086 | } |
| 1087 | |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 1088 | static int ehci_get_frame (struct usb_hcd *hcd) |
| 1089 | { |
| 1090 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 1091 | return (ehci_readl(ehci, &ehci->regs->frame_index) >> 3) % |
| 1092 | ehci->periodic_size; |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 1093 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | |
| 1095 | /*-------------------------------------------------------------------------*/ |
| 1096 | |
Alan Stern | 2b70f07 | 2008-10-02 11:47:15 -0400 | [diff] [blame] | 1097 | MODULE_DESCRIPTION(DRIVER_DESC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | MODULE_AUTHOR (DRIVER_AUTHOR); |
| 1099 | MODULE_LICENSE ("GPL"); |
| 1100 | |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 1101 | #ifdef CONFIG_PCI |
| 1102 | #include "ehci-pci.c" |
Kumar Gala | 01cced2 | 2006-04-11 10:07:16 -0500 | [diff] [blame] | 1103 | #define PCI_DRIVER ehci_pci_driver |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 1104 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | |
Li Yang | ba02978 | 2007-05-11 17:09:55 +0800 | [diff] [blame] | 1106 | #ifdef CONFIG_USB_EHCI_FSL |
Randy Vinson | 80cb9ae | 2006-01-20 13:53:38 -0800 | [diff] [blame] | 1107 | #include "ehci-fsl.c" |
Kumar Gala | 01cced2 | 2006-04-11 10:07:16 -0500 | [diff] [blame] | 1108 | #define PLATFORM_DRIVER ehci_fsl_driver |
Randy Vinson | 80cb9ae | 2006-01-20 13:53:38 -0800 | [diff] [blame] | 1109 | #endif |
| 1110 | |
Daniel Mack | 7e8d5cd | 2009-10-28 01:14:59 +0100 | [diff] [blame] | 1111 | #ifdef CONFIG_USB_EHCI_MXC |
| 1112 | #include "ehci-mxc.c" |
| 1113 | #define PLATFORM_DRIVER ehci_mxc_driver |
| 1114 | #endif |
| 1115 | |
Ralf Baechle | dfbaa7d | 2006-06-03 23:58:55 +0100 | [diff] [blame] | 1116 | #ifdef CONFIG_SOC_AU1200 |
Jordan Crouse | 76fa9a2 | 2006-01-20 14:06:09 -0800 | [diff] [blame] | 1117 | #include "ehci-au1xxx.c" |
Kumar Gala | 01cced2 | 2006-04-11 10:07:16 -0500 | [diff] [blame] | 1118 | #define PLATFORM_DRIVER ehci_hcd_au1xxx_driver |
Jordan Crouse | 76fa9a2 | 2006-01-20 14:06:09 -0800 | [diff] [blame] | 1119 | #endif |
| 1120 | |
Tony Lindgren | a8eb7ca | 2010-02-12 12:26:48 -0800 | [diff] [blame] | 1121 | #ifdef CONFIG_ARCH_OMAP3 |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 1122 | #include "ehci-omap.c" |
| 1123 | #define PLATFORM_DRIVER ehci_hcd_omap_driver |
| 1124 | #endif |
| 1125 | |
Geoff Levand | ad75a41 | 2007-01-15 20:11:47 -0800 | [diff] [blame] | 1126 | #ifdef CONFIG_PPC_PS3 |
| 1127 | #include "ehci-ps3.c" |
Geoff Levand | 7a4eb7f | 2007-06-05 20:04:35 -0700 | [diff] [blame] | 1128 | #define PS3_SYSTEM_BUS_DRIVER ps3_ehci_driver |
Geoff Levand | ad75a41 | 2007-01-15 20:11:47 -0800 | [diff] [blame] | 1129 | #endif |
| 1130 | |
Valentine Barshak | da0e8fb | 2007-12-30 15:28:50 -0800 | [diff] [blame] | 1131 | #ifdef CONFIG_USB_EHCI_HCD_PPC_OF |
| 1132 | #include "ehci-ppc-of.c" |
| 1133 | #define OF_PLATFORM_DRIVER ehci_hcd_ppc_of_driver |
| 1134 | #endif |
| 1135 | |
Julie Zhu | 08d3c18 | 2009-09-21 16:08:19 -0600 | [diff] [blame] | 1136 | #ifdef CONFIG_XPS_USB_HCD_XILINX |
| 1137 | #include "ehci-xilinx-of.c" |
Grant Likely | 1f23b2d | 2010-06-02 13:53:17 -0600 | [diff] [blame] | 1138 | #define XILINX_OF_PLATFORM_DRIVER ehci_hcd_xilinx_of_driver |
Julie Zhu | 08d3c18 | 2009-09-21 16:08:19 -0600 | [diff] [blame] | 1139 | #endif |
| 1140 | |
Lennert Buytenhek | 705a752 | 2008-03-27 14:51:40 -0400 | [diff] [blame] | 1141 | #ifdef CONFIG_PLAT_ORION |
Tzachi Perelstein | e96ffe2 | 2007-12-01 11:07:04 -0500 | [diff] [blame] | 1142 | #include "ehci-orion.c" |
| 1143 | #define PLATFORM_DRIVER ehci_orion_driver |
| 1144 | #endif |
| 1145 | |
Vladimir Barinov | 91bc4d3 | 2007-12-30 15:21:11 -0800 | [diff] [blame] | 1146 | #ifdef CONFIG_ARCH_IXP4XX |
| 1147 | #include "ehci-ixp4xx.c" |
| 1148 | #define PLATFORM_DRIVER ixp4xx_ehci_driver |
| 1149 | #endif |
| 1150 | |
Wan ZongShun | 586dfc8 | 2009-06-13 09:14:28 +0800 | [diff] [blame] | 1151 | #ifdef CONFIG_USB_W90X900_EHCI |
| 1152 | #include "ehci-w90x900.c" |
| 1153 | #define PLATFORM_DRIVER ehci_hcd_w90x900_driver |
| 1154 | #endif |
| 1155 | |
Nicolas Ferre | 501c9c0 | 2009-07-27 14:47:40 -0700 | [diff] [blame] | 1156 | #ifdef CONFIG_ARCH_AT91 |
| 1157 | #include "ehci-atmel.c" |
| 1158 | #define PLATFORM_DRIVER ehci_atmel_driver |
| 1159 | #endif |
| 1160 | |
Geoff Levand | ad75a41 | 2007-01-15 20:11:47 -0800 | [diff] [blame] | 1161 | #if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \ |
Grant Likely | 1f23b2d | 2010-06-02 13:53:17 -0600 | [diff] [blame] | 1162 | !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \ |
| 1163 | !defined(XILINX_OF_PLATFORM_DRIVER) |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 1164 | #error "missing bus glue for ehci-hcd" |
| 1165 | #endif |
Kumar Gala | 01cced2 | 2006-04-11 10:07:16 -0500 | [diff] [blame] | 1166 | |
| 1167 | static int __init ehci_hcd_init(void) |
| 1168 | { |
| 1169 | int retval = 0; |
| 1170 | |
Alan Stern | 2b70f07 | 2008-10-02 11:47:15 -0400 | [diff] [blame] | 1171 | if (usb_disabled()) |
| 1172 | return -ENODEV; |
| 1173 | |
| 1174 | printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name); |
Alan Stern | 9beeee6 | 2008-10-02 11:48:13 -0400 | [diff] [blame] | 1175 | set_bit(USB_EHCI_LOADED, &usb_hcds_loaded); |
| 1176 | if (test_bit(USB_UHCI_LOADED, &usb_hcds_loaded) || |
| 1177 | test_bit(USB_OHCI_LOADED, &usb_hcds_loaded)) |
| 1178 | printk(KERN_WARNING "Warning! ehci_hcd should always be loaded" |
| 1179 | " before uhci_hcd and ohci_hcd, not after\n"); |
| 1180 | |
Kumar Gala | 01cced2 | 2006-04-11 10:07:16 -0500 | [diff] [blame] | 1181 | pr_debug("%s: block sizes: qh %Zd qtd %Zd itd %Zd sitd %Zd\n", |
| 1182 | hcd_name, |
| 1183 | sizeof(struct ehci_qh), sizeof(struct ehci_qtd), |
| 1184 | sizeof(struct ehci_itd), sizeof(struct ehci_sitd)); |
| 1185 | |
Tony Jones | 694cc20 | 2007-09-11 14:07:31 -0700 | [diff] [blame] | 1186 | #ifdef DEBUG |
Greg Kroah-Hartman | 08f4e58 | 2009-04-24 15:13:18 -0700 | [diff] [blame] | 1187 | ehci_debug_root = debugfs_create_dir("ehci", usb_debug_root); |
Alan Stern | 9beeee6 | 2008-10-02 11:48:13 -0400 | [diff] [blame] | 1188 | if (!ehci_debug_root) { |
| 1189 | retval = -ENOENT; |
| 1190 | goto err_debug; |
| 1191 | } |
Tony Jones | 694cc20 | 2007-09-11 14:07:31 -0700 | [diff] [blame] | 1192 | #endif |
| 1193 | |
Kumar Gala | 01cced2 | 2006-04-11 10:07:16 -0500 | [diff] [blame] | 1194 | #ifdef PLATFORM_DRIVER |
| 1195 | retval = platform_driver_register(&PLATFORM_DRIVER); |
Valentine Barshak | da0e8fb | 2007-12-30 15:28:50 -0800 | [diff] [blame] | 1196 | if (retval < 0) |
| 1197 | goto clean0; |
Kumar Gala | 01cced2 | 2006-04-11 10:07:16 -0500 | [diff] [blame] | 1198 | #endif |
| 1199 | |
| 1200 | #ifdef PCI_DRIVER |
| 1201 | retval = pci_register_driver(&PCI_DRIVER); |
Valentine Barshak | da0e8fb | 2007-12-30 15:28:50 -0800 | [diff] [blame] | 1202 | if (retval < 0) |
| 1203 | goto clean1; |
Geoff Levand | ad75a41 | 2007-01-15 20:11:47 -0800 | [diff] [blame] | 1204 | #endif |
| 1205 | |
| 1206 | #ifdef PS3_SYSTEM_BUS_DRIVER |
Geoff Levand | 7a4eb7f | 2007-06-05 20:04:35 -0700 | [diff] [blame] | 1207 | retval = ps3_ehci_driver_register(&PS3_SYSTEM_BUS_DRIVER); |
Valentine Barshak | da0e8fb | 2007-12-30 15:28:50 -0800 | [diff] [blame] | 1208 | if (retval < 0) |
| 1209 | goto clean2; |
Kumar Gala | 01cced2 | 2006-04-11 10:07:16 -0500 | [diff] [blame] | 1210 | #endif |
| 1211 | |
Valentine Barshak | da0e8fb | 2007-12-30 15:28:50 -0800 | [diff] [blame] | 1212 | #ifdef OF_PLATFORM_DRIVER |
| 1213 | retval = of_register_platform_driver(&OF_PLATFORM_DRIVER); |
| 1214 | if (retval < 0) |
| 1215 | goto clean3; |
| 1216 | #endif |
Grant Likely | 1f23b2d | 2010-06-02 13:53:17 -0600 | [diff] [blame] | 1217 | |
| 1218 | #ifdef XILINX_OF_PLATFORM_DRIVER |
| 1219 | retval = of_register_platform_driver(&XILINX_OF_PLATFORM_DRIVER); |
| 1220 | if (retval < 0) |
| 1221 | goto clean4; |
| 1222 | #endif |
Valentine Barshak | da0e8fb | 2007-12-30 15:28:50 -0800 | [diff] [blame] | 1223 | return retval; |
| 1224 | |
Grant Likely | 1f23b2d | 2010-06-02 13:53:17 -0600 | [diff] [blame] | 1225 | #ifdef XILINX_OF_PLATFORM_DRIVER |
| 1226 | /* of_unregister_platform_driver(&XILINX_OF_PLATFORM_DRIVER); */ |
| 1227 | clean4: |
| 1228 | #endif |
Valentine Barshak | da0e8fb | 2007-12-30 15:28:50 -0800 | [diff] [blame] | 1229 | #ifdef OF_PLATFORM_DRIVER |
Grant Likely | 1f23b2d | 2010-06-02 13:53:17 -0600 | [diff] [blame] | 1230 | of_unregister_platform_driver(&OF_PLATFORM_DRIVER); |
Valentine Barshak | da0e8fb | 2007-12-30 15:28:50 -0800 | [diff] [blame] | 1231 | clean3: |
| 1232 | #endif |
| 1233 | #ifdef PS3_SYSTEM_BUS_DRIVER |
| 1234 | ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER); |
| 1235 | clean2: |
| 1236 | #endif |
| 1237 | #ifdef PCI_DRIVER |
| 1238 | pci_unregister_driver(&PCI_DRIVER); |
| 1239 | clean1: |
| 1240 | #endif |
| 1241 | #ifdef PLATFORM_DRIVER |
| 1242 | platform_driver_unregister(&PLATFORM_DRIVER); |
| 1243 | clean0: |
| 1244 | #endif |
| 1245 | #ifdef DEBUG |
| 1246 | debugfs_remove(ehci_debug_root); |
| 1247 | ehci_debug_root = NULL; |
Alan Stern | 9beeee6 | 2008-10-02 11:48:13 -0400 | [diff] [blame] | 1248 | err_debug: |
Linus Torvalds | a9b6148 | 2008-10-20 14:23:29 -0700 | [diff] [blame] | 1249 | #endif |
Alan Stern | 9beeee6 | 2008-10-02 11:48:13 -0400 | [diff] [blame] | 1250 | clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded); |
Kumar Gala | 01cced2 | 2006-04-11 10:07:16 -0500 | [diff] [blame] | 1251 | return retval; |
| 1252 | } |
| 1253 | module_init(ehci_hcd_init); |
| 1254 | |
| 1255 | static void __exit ehci_hcd_cleanup(void) |
| 1256 | { |
Grant Likely | 1f23b2d | 2010-06-02 13:53:17 -0600 | [diff] [blame] | 1257 | #ifdef XILINX_OF_PLATFORM_DRIVER |
| 1258 | of_unregister_platform_driver(&XILINX_OF_PLATFORM_DRIVER); |
| 1259 | #endif |
Valentine Barshak | da0e8fb | 2007-12-30 15:28:50 -0800 | [diff] [blame] | 1260 | #ifdef OF_PLATFORM_DRIVER |
| 1261 | of_unregister_platform_driver(&OF_PLATFORM_DRIVER); |
| 1262 | #endif |
Kumar Gala | 01cced2 | 2006-04-11 10:07:16 -0500 | [diff] [blame] | 1263 | #ifdef PLATFORM_DRIVER |
| 1264 | platform_driver_unregister(&PLATFORM_DRIVER); |
| 1265 | #endif |
| 1266 | #ifdef PCI_DRIVER |
| 1267 | pci_unregister_driver(&PCI_DRIVER); |
| 1268 | #endif |
Geoff Levand | ad75a41 | 2007-01-15 20:11:47 -0800 | [diff] [blame] | 1269 | #ifdef PS3_SYSTEM_BUS_DRIVER |
Geoff Levand | 7a4eb7f | 2007-06-05 20:04:35 -0700 | [diff] [blame] | 1270 | ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER); |
Geoff Levand | ad75a41 | 2007-01-15 20:11:47 -0800 | [diff] [blame] | 1271 | #endif |
Tony Jones | 694cc20 | 2007-09-11 14:07:31 -0700 | [diff] [blame] | 1272 | #ifdef DEBUG |
| 1273 | debugfs_remove(ehci_debug_root); |
| 1274 | #endif |
Alan Stern | 9beeee6 | 2008-10-02 11:48:13 -0400 | [diff] [blame] | 1275 | clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded); |
Kumar Gala | 01cced2 | 2006-04-11 10:07:16 -0500 | [diff] [blame] | 1276 | } |
| 1277 | module_exit(ehci_hcd_cleanup); |
| 1278 | |