Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
578333ab AS |
2 | * Enhanced Host Controller Interface (EHCI) driver for USB. |
3 | * | |
4 | * Maintainer: Alan Stern <stern@rowland.harvard.edu> | |
5 | * | |
1da177e4 | 6 | * Copyright (c) 2000-2004 by David Brownell |
53bd6a60 | 7 | * |
1da177e4 LT |
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 | ||
1da177e4 LT |
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> | |
3c04e20e | 30 | #include <linux/vmalloc.h> |
1da177e4 LT |
31 | #include <linux/errno.h> |
32 | #include <linux/init.h> | |
d58b4bcc | 33 | #include <linux/hrtimer.h> |
1da177e4 LT |
34 | #include <linux/list.h> |
35 | #include <linux/interrupt.h> | |
1da177e4 | 36 | #include <linux/usb.h> |
27729aad | 37 | #include <linux/usb/hcd.h> |
1da177e4 LT |
38 | #include <linux/moduleparam.h> |
39 | #include <linux/dma-mapping.h> | |
694cc208 | 40 | #include <linux/debugfs.h> |
5a0e3ad6 | 41 | #include <linux/slab.h> |
1da177e4 | 42 | |
1da177e4 LT |
43 | #include <asm/byteorder.h> |
44 | #include <asm/io.h> | |
45 | #include <asm/irq.h> | |
1da177e4 | 46 | #include <asm/unaligned.h> |
1da177e4 | 47 | |
df7c1ca2 GL |
48 | #if defined(CONFIG_PPC_PS3) |
49 | #include <asm/firmware.h> | |
50 | #endif | |
51 | ||
1da177e4 LT |
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! | |
1da177e4 LT |
66 | */ |
67 | ||
1da177e4 LT |
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 | ||
1da177e4 LT |
74 | #undef EHCI_URB_TRACE |
75 | ||
1da177e4 LT |
76 | /* magic numbers that can affect system performance */ |
77 | #define EHCI_TUNE_CERR 3 /* 0-3 qtd retries; 0 == don't stop */ | |
78 | #define EHCI_TUNE_RL_HS 4 /* nak throttle; see 4.9 */ | |
79 | #define EHCI_TUNE_RL_TT 0 | |
80 | #define EHCI_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */ | |
81 | #define EHCI_TUNE_MULT_TT 1 | |
ffda0803 AS |
82 | /* |
83 | * Some drivers think it's safe to schedule isochronous transfers more than | |
84 | * 256 ms into the future (partly as a result of an old bug in the scheduling | |
85 | * code). In an attempt to avoid trouble, we will use a minimum scheduling | |
86 | * length of 512 frames instead of 256. | |
87 | */ | |
88 | #define EHCI_TUNE_FLS 1 /* (medium) 512-frame schedule */ | |
1da177e4 | 89 | |
1da177e4 LT |
90 | /* Initial IRQ latency: faster than hw default */ |
91 | static int log2_irq_thresh = 0; // 0 to 6 | |
92 | module_param (log2_irq_thresh, int, S_IRUGO); | |
93 | MODULE_PARM_DESC (log2_irq_thresh, "log2 IRQ latency, 1-64 microframes"); | |
94 | ||
95 | /* initial park setting: slower than hw default */ | |
96 | static unsigned park = 0; | |
97 | module_param (park, uint, S_IRUGO); | |
98 | MODULE_PARM_DESC (park, "park setting; 1-3 back-to-back async packets"); | |
99 | ||
93f1a47c | 100 | /* for flakey hardware, ignore overcurrent indicators */ |
90ab5ee9 | 101 | static bool ignore_oc = 0; |
93f1a47c DB |
102 | module_param (ignore_oc, bool, S_IRUGO); |
103 | MODULE_PARM_DESC (ignore_oc, "ignore bogus hardware overcurrent indications"); | |
104 | ||
1da177e4 LT |
105 | #define INTR_MASK (STS_IAA | STS_FATAL | STS_PCD | STS_ERR | STS_INT) |
106 | ||
107 | /*-------------------------------------------------------------------------*/ | |
108 | ||
109 | #include "ehci.h" | |
ad93562b | 110 | #include "pci-quirks.h" |
1da177e4 | 111 | |
b35c5009 AS |
112 | static void compute_tt_budget(u8 budget_table[EHCI_BANDWIDTH_SIZE], |
113 | struct ehci_tt *tt); | |
114 | ||
acc08503 AS |
115 | /* |
116 | * The MosChip MCS9990 controller updates its microframe counter | |
117 | * a little before the frame counter, and occasionally we will read | |
118 | * the invalid intermediate value. Avoid problems by checking the | |
119 | * microframe number (the low-order 3 bits); if they are 0 then | |
120 | * re-read the register to get the correct value. | |
121 | */ | |
122 | static unsigned ehci_moschip_read_frame_index(struct ehci_hcd *ehci) | |
123 | { | |
124 | unsigned uf; | |
125 | ||
126 | uf = ehci_readl(ehci, &ehci->regs->frame_index); | |
127 | if (unlikely((uf & 7) == 0)) | |
128 | uf = ehci_readl(ehci, &ehci->regs->frame_index); | |
129 | return uf; | |
130 | } | |
131 | ||
132 | static inline unsigned ehci_read_frame_index(struct ehci_hcd *ehci) | |
133 | { | |
134 | if (ehci->frame_index_bug) | |
135 | return ehci_moschip_read_frame_index(ehci); | |
136 | return ehci_readl(ehci, &ehci->regs->frame_index); | |
137 | } | |
138 | ||
139 | #include "ehci-dbg.c" | |
140 | ||
1da177e4 LT |
141 | /*-------------------------------------------------------------------------*/ |
142 | ||
143 | /* | |
2f3a6b86 | 144 | * ehci_handshake - spin reading hc until handshake completes or fails |
1da177e4 LT |
145 | * @ptr: address of hc register to be read |
146 | * @mask: bits to look at in result of read | |
147 | * @done: value of those bits when handshake succeeds | |
148 | * @usec: timeout in microseconds | |
149 | * | |
150 | * Returns negative errno, or zero on success | |
151 | * | |
152 | * Success happens when the "mask" bits have the specified value (hardware | |
153 | * handshake done). There are two failure modes: "usec" have passed (major | |
154 | * hardware flakeout), or the register reads as all-ones (hardware removed). | |
155 | * | |
156 | * That last failure should_only happen in cases like physical cardbus eject | |
157 | * before driver shutdown. But it also seems to be caused by bugs in cardbus | |
158 | * bridge shutdown: shutting down the bridge before the devices using it. | |
159 | */ | |
2f3a6b86 MG |
160 | int ehci_handshake(struct ehci_hcd *ehci, void __iomem *ptr, |
161 | u32 mask, u32 done, int usec) | |
1da177e4 LT |
162 | { |
163 | u32 result; | |
164 | ||
165 | do { | |
083522d7 | 166 | result = ehci_readl(ehci, ptr); |
1da177e4 LT |
167 | if (result == ~(u32)0) /* card removed */ |
168 | return -ENODEV; | |
169 | result &= mask; | |
170 | if (result == done) | |
171 | return 0; | |
172 | udelay (1); | |
173 | usec--; | |
174 | } while (usec > 0); | |
175 | return -ETIMEDOUT; | |
176 | } | |
2f3a6b86 | 177 | EXPORT_SYMBOL_GPL(ehci_handshake); |
1da177e4 | 178 | |
65fd4272 MC |
179 | /* check TDI/ARC silicon is in host mode */ |
180 | static int tdi_in_host_mode (struct ehci_hcd *ehci) | |
181 | { | |
65fd4272 MC |
182 | u32 tmp; |
183 | ||
a46af4eb | 184 | tmp = ehci_readl(ehci, &ehci->regs->usbmode); |
65fd4272 MC |
185 | return (tmp & 3) == USBMODE_CM_HC; |
186 | } | |
187 | ||
c4f34764 AS |
188 | /* |
189 | * Force HC to halt state from unknown (EHCI spec section 2.3). | |
190 | * Must be called with interrupts enabled and the lock not held. | |
191 | */ | |
1da177e4 LT |
192 | static int ehci_halt (struct ehci_hcd *ehci) |
193 | { | |
c4f34764 AS |
194 | u32 temp; |
195 | ||
196 | spin_lock_irq(&ehci->lock); | |
1da177e4 | 197 | |
72f30b6f | 198 | /* disable any irqs left enabled by previous code */ |
083522d7 | 199 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); |
72f30b6f | 200 | |
c4f34764 AS |
201 | if (ehci_is_TDI(ehci) && !tdi_in_host_mode(ehci)) { |
202 | spin_unlock_irq(&ehci->lock); | |
65fd4272 MC |
203 | return 0; |
204 | } | |
205 | ||
3d9545cc AS |
206 | /* |
207 | * This routine gets called during probe before ehci->command | |
208 | * has been initialized, so we can't rely on its value. | |
209 | */ | |
210 | ehci->command &= ~CMD_RUN; | |
083522d7 | 211 | temp = ehci_readl(ehci, &ehci->regs->command); |
3d9545cc | 212 | temp &= ~(CMD_RUN | CMD_IAAD); |
083522d7 | 213 | ehci_writel(ehci, temp, &ehci->regs->command); |
df7c1ca2 | 214 | |
c4f34764 AS |
215 | spin_unlock_irq(&ehci->lock); |
216 | synchronize_irq(ehci_to_hcd(ehci)->irq); | |
0bcfeb3e | 217 | |
2f3a6b86 | 218 | return ehci_handshake(ehci, &ehci->regs->status, |
083522d7 | 219 | STS_HALT, STS_HALT, 16 * 125); |
0bcfeb3e DB |
220 | } |
221 | ||
1da177e4 LT |
222 | /* put TDI/ARC silicon into EHCI mode */ |
223 | static void tdi_reset (struct ehci_hcd *ehci) | |
224 | { | |
1da177e4 LT |
225 | u32 tmp; |
226 | ||
a46af4eb | 227 | tmp = ehci_readl(ehci, &ehci->regs->usbmode); |
d23a1377 VB |
228 | tmp |= USBMODE_CM_HC; |
229 | /* The default byte access to MMR space is LE after | |
230 | * controller reset. Set the required endian mode | |
231 | * for transfer buffers to match the host microprocessor | |
232 | */ | |
233 | if (ehci_big_endian_mmio(ehci)) | |
234 | tmp |= USBMODE_BE; | |
a46af4eb | 235 | ehci_writel(ehci, tmp, &ehci->regs->usbmode); |
1da177e4 LT |
236 | } |
237 | ||
c4f34764 AS |
238 | /* |
239 | * Reset a non-running (STS_HALT == 1) controller. | |
240 | * Must be called with interrupts enabled and the lock not held. | |
241 | */ | |
1da177e4 LT |
242 | static int ehci_reset (struct ehci_hcd *ehci) |
243 | { | |
244 | int retval; | |
083522d7 | 245 | u32 command = ehci_readl(ehci, &ehci->regs->command); |
1da177e4 | 246 | |
8d053c79 JW |
247 | /* If the EHCI debug controller is active, special care must be |
248 | * taken before and after a host controller reset */ | |
9fa5780b | 249 | if (ehci->debug && !dbgp_reset_prep(ehci_to_hcd(ehci))) |
8d053c79 JW |
250 | ehci->debug = NULL; |
251 | ||
1da177e4 LT |
252 | command |= CMD_RESET; |
253 | dbg_cmd (ehci, "reset", command); | |
083522d7 | 254 | ehci_writel(ehci, command, &ehci->regs->command); |
e8799906 | 255 | ehci->rh_state = EHCI_RH_HALTED; |
1da177e4 | 256 | ehci->next_statechange = jiffies; |
2f3a6b86 | 257 | retval = ehci_handshake(ehci, &ehci->regs->command, |
083522d7 | 258 | CMD_RESET, 0, 250 * 1000); |
1da177e4 | 259 | |
331ac6b2 AD |
260 | if (ehci->has_hostpc) { |
261 | ehci_writel(ehci, USBMODE_EX_HC | USBMODE_EX_VBPS, | |
a46af4eb AS |
262 | &ehci->regs->usbmode_ex); |
263 | ehci_writel(ehci, TXFIFO_DEFAULT, &ehci->regs->txfill_tuning); | |
331ac6b2 | 264 | } |
1da177e4 LT |
265 | if (retval) |
266 | return retval; | |
267 | ||
268 | if (ehci_is_TDI(ehci)) | |
269 | tdi_reset (ehci); | |
270 | ||
8d053c79 | 271 | if (ehci->debug) |
9fa5780b | 272 | dbgp_external_startup(ehci_to_hcd(ehci)); |
8d053c79 | 273 | |
a448e4dc AS |
274 | ehci->port_c_suspend = ehci->suspended_ports = |
275 | ehci->resuming_ports = 0; | |
1da177e4 LT |
276 | return retval; |
277 | } | |
278 | ||
c4f34764 AS |
279 | /* |
280 | * Idle the controller (turn off the schedules). | |
281 | * Must be called with interrupts enabled and the lock not held. | |
282 | */ | |
1da177e4 LT |
283 | static void ehci_quiesce (struct ehci_hcd *ehci) |
284 | { | |
285 | u32 temp; | |
286 | ||
e8799906 | 287 | if (ehci->rh_state != EHCI_RH_RUNNING) |
c0c53dbc | 288 | return; |
1da177e4 LT |
289 | |
290 | /* wait for any schedule enables/disables to take effect */ | |
3d9545cc | 291 | temp = (ehci->command << 10) & (STS_ASS | STS_PSS); |
2f3a6b86 MG |
292 | ehci_handshake(ehci, &ehci->regs->status, STS_ASS | STS_PSS, temp, |
293 | 16 * 125); | |
1da177e4 LT |
294 | |
295 | /* then disable anything that's still active */ | |
c4f34764 | 296 | spin_lock_irq(&ehci->lock); |
3d9545cc AS |
297 | ehci->command &= ~(CMD_ASE | CMD_PSE); |
298 | ehci_writel(ehci, ehci->command, &ehci->regs->command); | |
c4f34764 | 299 | spin_unlock_irq(&ehci->lock); |
1da177e4 LT |
300 | |
301 | /* hardware can take 16 microframes to turn off ... */ | |
2f3a6b86 MG |
302 | ehci_handshake(ehci, &ehci->regs->status, STS_ASS | STS_PSS, 0, |
303 | 16 * 125); | |
1da177e4 LT |
304 | } |
305 | ||
306 | /*-------------------------------------------------------------------------*/ | |
307 | ||
07d29b63 | 308 | static void end_unlink_async(struct ehci_hcd *ehci); |
32830f20 | 309 | static void unlink_empty_async(struct ehci_hcd *ehci); |
2a40f324 | 310 | static void unlink_empty_async_suspended(struct ehci_hcd *ehci); |
7d12e780 | 311 | static void ehci_work(struct ehci_hcd *ehci); |
df202255 AS |
312 | static void start_unlink_intr(struct ehci_hcd *ehci, struct ehci_qh *qh); |
313 | static void end_unlink_intr(struct ehci_hcd *ehci, struct ehci_qh *qh); | |
11a7e594 | 314 | static int ehci_port_power(struct ehci_hcd *ehci, int portnum, bool enable); |
1da177e4 | 315 | |
d58b4bcc | 316 | #include "ehci-timer.c" |
1da177e4 LT |
317 | #include "ehci-hub.c" |
318 | #include "ehci-mem.c" | |
319 | #include "ehci-q.c" | |
320 | #include "ehci-sched.c" | |
4c67045b | 321 | #include "ehci-sysfs.c" |
1da177e4 LT |
322 | |
323 | /*-------------------------------------------------------------------------*/ | |
324 | ||
8903795a AS |
325 | /* On some systems, leaving remote wakeup enabled prevents system shutdown. |
326 | * The firmware seems to think that powering off is a wakeup event! | |
327 | * This routine turns off remote wakeup and everything else, on all ports. | |
328 | */ | |
329 | static void ehci_turn_off_all_ports(struct ehci_hcd *ehci) | |
330 | { | |
331 | int port = HCS_N_PORTS(ehci->hcs_params); | |
332 | ||
11a7e594 | 333 | while (port--) { |
8903795a AS |
334 | ehci_writel(ehci, PORT_RWC_BITS, |
335 | &ehci->regs->port_status[port]); | |
11a7e594 MG |
336 | spin_unlock_irq(&ehci->lock); |
337 | ehci_port_power(ehci, port, false); | |
338 | spin_lock_irq(&ehci->lock); | |
339 | } | |
8903795a AS |
340 | } |
341 | ||
21da84a8 SS |
342 | /* |
343 | * Halt HC, turn off all ports, and let the BIOS use the companion controllers. | |
c4f34764 | 344 | * Must be called with interrupts enabled and the lock not held. |
72f30b6f | 345 | */ |
21da84a8 | 346 | static void ehci_silence_controller(struct ehci_hcd *ehci) |
1da177e4 | 347 | { |
21da84a8 | 348 | ehci_halt(ehci); |
c4f34764 AS |
349 | |
350 | spin_lock_irq(&ehci->lock); | |
351 | ehci->rh_state = EHCI_RH_HALTED; | |
8903795a | 352 | ehci_turn_off_all_ports(ehci); |
1da177e4 LT |
353 | |
354 | /* make BIOS/etc use companion controller during reboot */ | |
083522d7 | 355 | ehci_writel(ehci, 0, &ehci->regs->configured_flag); |
8903795a AS |
356 | |
357 | /* unblock posted writes */ | |
358 | ehci_readl(ehci, &ehci->regs->configured_flag); | |
c4f34764 | 359 | spin_unlock_irq(&ehci->lock); |
1da177e4 LT |
360 | } |
361 | ||
21da84a8 SS |
362 | /* ehci_shutdown kick in for silicon on any bus (not just pci, etc). |
363 | * This forcibly disables dma and IRQs, helping kexec and other cases | |
364 | * where the next system software may expect clean state. | |
365 | */ | |
366 | static void ehci_shutdown(struct usb_hcd *hcd) | |
367 | { | |
368 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
369 | ||
21da84a8 | 370 | spin_lock_irq(&ehci->lock); |
43fe3a99 | 371 | ehci->shutdown = true; |
c0c53dbc | 372 | ehci->rh_state = EHCI_RH_STOPPING; |
d58b4bcc | 373 | ehci->enabled_hrtimer_events = 0; |
21da84a8 | 374 | spin_unlock_irq(&ehci->lock); |
d58b4bcc | 375 | |
c4f34764 AS |
376 | ehci_silence_controller(ehci); |
377 | ||
d58b4bcc | 378 | hrtimer_cancel(&ehci->hrtimer); |
21da84a8 SS |
379 | } |
380 | ||
7ff71d6a | 381 | /*-------------------------------------------------------------------------*/ |
1da177e4 | 382 | |
7ff71d6a MP |
383 | /* |
384 | * ehci_work is called from some interrupts, timers, and so on. | |
385 | * it calls driver completion functions, after dropping ehci->lock. | |
386 | */ | |
7d12e780 | 387 | static void ehci_work (struct ehci_hcd *ehci) |
7ff71d6a | 388 | { |
7ff71d6a MP |
389 | /* another CPU may drop ehci->lock during a schedule scan while |
390 | * it reports urb completions. this flag guards against bogus | |
391 | * attempts at re-entrant schedule scanning. | |
392 | */ | |
361aabf3 AS |
393 | if (ehci->scanning) { |
394 | ehci->need_rescan = true; | |
7ff71d6a | 395 | return; |
361aabf3 AS |
396 | } |
397 | ehci->scanning = true; | |
398 | ||
399 | rescan: | |
400 | ehci->need_rescan = false; | |
31446610 AS |
401 | if (ehci->async_count) |
402 | scan_async(ehci); | |
569b394f AS |
403 | if (ehci->intr_count > 0) |
404 | scan_intr(ehci); | |
405 | if (ehci->isoc_count > 0) | |
406 | scan_isoc(ehci); | |
361aabf3 AS |
407 | if (ehci->need_rescan) |
408 | goto rescan; | |
409 | ehci->scanning = false; | |
7ff71d6a MP |
410 | |
411 | /* the IO watchdog guards against hardware or driver bugs that | |
412 | * misplace IRQs, and should let us run completely without IRQs. | |
413 | * such lossage has been observed on both VT6202 and VT8235. | |
414 | */ | |
18aafe64 | 415 | turn_on_io_watchdog(ehci); |
7ff71d6a | 416 | } |
1da177e4 | 417 | |
21da84a8 SS |
418 | /* |
419 | * Called when the ehci_hcd module is removed. | |
420 | */ | |
7ff71d6a | 421 | static void ehci_stop (struct usb_hcd *hcd) |
1da177e4 LT |
422 | { |
423 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
1da177e4 | 424 | |
7ff71d6a | 425 | ehci_dbg (ehci, "stop\n"); |
1da177e4 | 426 | |
7ff71d6a | 427 | /* no more interrupts ... */ |
56c1e26d | 428 | |
7ff71d6a | 429 | spin_lock_irq(&ehci->lock); |
d58b4bcc | 430 | ehci->enabled_hrtimer_events = 0; |
c4f34764 | 431 | spin_unlock_irq(&ehci->lock); |
1da177e4 | 432 | |
c4f34764 | 433 | ehci_quiesce(ehci); |
21da84a8 | 434 | ehci_silence_controller(ehci); |
7ff71d6a | 435 | ehci_reset (ehci); |
1da177e4 | 436 | |
d58b4bcc | 437 | hrtimer_cancel(&ehci->hrtimer); |
4c67045b | 438 | remove_sysfs_files(ehci); |
7ff71d6a | 439 | remove_debug_files (ehci); |
1da177e4 | 440 | |
7ff71d6a MP |
441 | /* root hub is shut down separately (first, when possible) */ |
442 | spin_lock_irq (&ehci->lock); | |
55934eb3 | 443 | end_free_itds(ehci); |
7ff71d6a MP |
444 | spin_unlock_irq (&ehci->lock); |
445 | ehci_mem_cleanup (ehci); | |
1da177e4 | 446 | |
ad93562b AX |
447 | if (ehci->amd_pll_fix == 1) |
448 | usb_amd_dev_put(); | |
05570297 | 449 | |
083522d7 BH |
450 | dbg_status (ehci, "ehci_stop completed", |
451 | ehci_readl(ehci, &ehci->regs->status)); | |
1da177e4 LT |
452 | } |
453 | ||
18807521 DB |
454 | /* one-time init, only for memory state */ |
455 | static int ehci_init(struct usb_hcd *hcd) | |
1da177e4 | 456 | { |
18807521 | 457 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
1da177e4 | 458 | u32 temp; |
1da177e4 LT |
459 | int retval; |
460 | u32 hcc_params; | |
3807e26d | 461 | struct ehci_qh_hw *hw; |
18807521 DB |
462 | |
463 | spin_lock_init(&ehci->lock); | |
464 | ||
403dbd36 AD |
465 | /* |
466 | * keep io watchdog by default, those good HCDs could turn off it later | |
467 | */ | |
468 | ehci->need_io_watchdog = 1; | |
1da177e4 | 469 | |
d58b4bcc AS |
470 | hrtimer_init(&ehci->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); |
471 | ehci->hrtimer.function = ehci_hrtimer_func; | |
472 | ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT; | |
07d29b63 | 473 | |
f75593ce AS |
474 | hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params); |
475 | ||
cc62a7eb KS |
476 | /* |
477 | * by default set standard 80% (== 100 usec/uframe) max periodic | |
478 | * bandwidth as required by USB 2.0 | |
479 | */ | |
480 | ehci->uframe_periodic_max = 100; | |
481 | ||
1da177e4 LT |
482 | /* |
483 | * hw default: 1K periodic list heads, one per frame. | |
484 | * periodic_size can shrink by USBCMD update if hcc_params allows. | |
485 | */ | |
486 | ehci->periodic_size = DEFAULT_I_TDPS; | |
6e018751 | 487 | INIT_LIST_HEAD(&ehci->async_unlink); |
214ac7a0 | 488 | INIT_LIST_HEAD(&ehci->async_idle); |
9118f9eb | 489 | INIT_LIST_HEAD(&ehci->intr_unlink_wait); |
6e018751 | 490 | INIT_LIST_HEAD(&ehci->intr_unlink); |
569b394f | 491 | INIT_LIST_HEAD(&ehci->intr_qh_list); |
9aa09d2f | 492 | INIT_LIST_HEAD(&ehci->cached_itd_list); |
0e5f231b | 493 | INIT_LIST_HEAD(&ehci->cached_sitd_list); |
b35c5009 | 494 | INIT_LIST_HEAD(&ehci->tt_list); |
f75593ce | 495 | |
8e192910 | 496 | if (HCC_PGM_FRAMELISTLEN(hcc_params)) { |
f75593ce AS |
497 | /* periodic schedule size can be smaller than default */ |
498 | switch (EHCI_TUNE_FLS) { | |
499 | case 0: ehci->periodic_size = 1024; break; | |
500 | case 1: ehci->periodic_size = 512; break; | |
501 | case 2: ehci->periodic_size = 256; break; | |
502 | default: BUG(); | |
503 | } | |
504 | } | |
18807521 | 505 | if ((retval = ehci_mem_init(ehci, GFP_KERNEL)) < 0) |
1da177e4 LT |
506 | return retval; |
507 | ||
508 | /* controllers may cache some of the periodic schedule ... */ | |
53bd6a60 | 509 | if (HCC_ISOC_CACHE(hcc_params)) // full frame cache |
98cae42d | 510 | ehci->i_thresh = 0; |
1da177e4 | 511 | else // N microframes cached |
18807521 | 512 | ehci->i_thresh = 2 + HCC_ISOC_THRES(hcc_params); |
1da177e4 | 513 | |
1da177e4 LT |
514 | /* |
515 | * dedicate a qh for the async ring head, since we couldn't unlink | |
516 | * a 'real' qh without stopping the async schedule [4.8]. use it | |
517 | * as the 'reclamation list head' too. | |
518 | * its dummy is used in hw_alt_next of many tds, to prevent the qh | |
519 | * from automatically advancing to the next td after short reads. | |
520 | */ | |
18807521 | 521 | ehci->async->qh_next.qh = NULL; |
3807e26d AD |
522 | hw = ehci->async->hw; |
523 | hw->hw_next = QH_NEXT(ehci, ehci->async->qh_dma); | |
524 | hw->hw_info1 = cpu_to_hc32(ehci, QH_HEAD); | |
4f7a67e2 | 525 | #if defined(CONFIG_PPC_PS3) |
4c53de72 | 526 | hw->hw_info1 |= cpu_to_hc32(ehci, QH_INACTIVATE); |
4f7a67e2 | 527 | #endif |
3807e26d AD |
528 | hw->hw_token = cpu_to_hc32(ehci, QTD_STS_HALT); |
529 | hw->hw_qtd_next = EHCI_LIST_END(ehci); | |
18807521 | 530 | ehci->async->qh_state = QH_STATE_LINKED; |
3807e26d | 531 | hw->hw_alt_next = QTD_NEXT(ehci, ehci->async->dummy->qtd_dma); |
1da177e4 LT |
532 | |
533 | /* clear interrupt enables, set irq latency */ | |
534 | if (log2_irq_thresh < 0 || log2_irq_thresh > 6) | |
535 | log2_irq_thresh = 0; | |
536 | temp = 1 << (16 + log2_irq_thresh); | |
5a9cdf33 AD |
537 | if (HCC_PER_PORT_CHANGE_EVENT(hcc_params)) { |
538 | ehci->has_ppcd = 1; | |
539 | ehci_dbg(ehci, "enable per-port change event\n"); | |
540 | temp |= CMD_PPCEE; | |
541 | } | |
1da177e4 LT |
542 | if (HCC_CANPARK(hcc_params)) { |
543 | /* HW default park == 3, on hardware that supports it (like | |
544 | * NVidia and ALI silicon), maximizes throughput on the async | |
545 | * schedule by avoiding QH fetches between transfers. | |
546 | * | |
547 | * With fast usb storage devices and NForce2, "park" seems to | |
548 | * make problems: throughput reduction (!), data errors... | |
549 | */ | |
550 | if (park) { | |
18807521 | 551 | park = min(park, (unsigned) 3); |
1da177e4 LT |
552 | temp |= CMD_PARK; |
553 | temp |= park << 8; | |
554 | } | |
18807521 | 555 | ehci_dbg(ehci, "park %d\n", park); |
1da177e4 | 556 | } |
18807521 | 557 | if (HCC_PGM_FRAMELISTLEN(hcc_params)) { |
1da177e4 LT |
558 | /* periodic schedule size can be smaller than default */ |
559 | temp &= ~(3 << 2); | |
560 | temp |= (EHCI_TUNE_FLS << 2); | |
1da177e4 | 561 | } |
18807521 DB |
562 | ehci->command = temp; |
563 | ||
40f8db8f | 564 | /* Accept arbitrarily long scatter-gather lists */ |
4307a28e AR |
565 | if (!(hcd->driver->flags & HCD_LOCAL_MEM)) |
566 | hcd->self.sg_tablesize = ~0; | |
18807521 DB |
567 | return 0; |
568 | } | |
569 | ||
570 | /* start HC running; it's halted, ehci_init() has been run (once) */ | |
571 | static int ehci_run (struct usb_hcd *hcd) | |
572 | { | |
573 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
18807521 DB |
574 | u32 temp; |
575 | u32 hcc_params; | |
576 | ||
1d619f12 | 577 | hcd->uses_new_polling = 1; |
1d619f12 | 578 | |
18807521 | 579 | /* EHCI spec section 4.1 */ |
876e0df9 | 580 | |
083522d7 BH |
581 | ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); |
582 | ehci_writel(ehci, (u32)ehci->async->qh_dma, &ehci->regs->async_next); | |
18807521 DB |
583 | |
584 | /* | |
585 | * hcc_params controls whether ehci->regs->segment must (!!!) | |
586 | * be used; it constrains QH/ITD/SITD and QTD locations. | |
587 | * pci_pool consistent memory always uses segment zero. | |
588 | * streaming mappings for I/O buffers, like pci_map_single(), | |
589 | * can return segments above 4GB, if the device allows. | |
590 | * | |
591 | * NOTE: the dma mask is visible through dma_supported(), so | |
592 | * drivers can pass this info along ... like NETIF_F_HIGHDMA, | |
593 | * Scsi_Host.highmem_io, and so forth. It's readonly to all | |
594 | * host side drivers though. | |
595 | */ | |
083522d7 | 596 | hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params); |
18807521 | 597 | if (HCC_64BIT_ADDR(hcc_params)) { |
083522d7 | 598 | ehci_writel(ehci, 0, &ehci->regs->segment); |
18807521 DB |
599 | #if 0 |
600 | // this is deeply broken on almost all architectures | |
6a35528a | 601 | if (!dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64))) |
18807521 DB |
602 | ehci_info(ehci, "enabled 64bit DMA\n"); |
603 | #endif | |
604 | } | |
605 | ||
606 | ||
1da177e4 LT |
607 | // Philips, Intel, and maybe others need CMD_RUN before the |
608 | // root hub will detect new devices (why?); NEC doesn't | |
18807521 DB |
609 | ehci->command &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET); |
610 | ehci->command |= CMD_RUN; | |
083522d7 | 611 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
18807521 | 612 | dbg_cmd (ehci, "init", ehci->command); |
1da177e4 | 613 | |
1da177e4 LT |
614 | /* |
615 | * Start, enabling full USB 2.0 functionality ... usb 1.1 devices | |
616 | * are explicitly handed to companion controller(s), so no TT is | |
617 | * involved with the root hub. (Except where one is integrated, | |
618 | * and there's no companion controller unless maybe for USB OTG.) | |
32fe0198 AS |
619 | * |
620 | * Turning on the CF flag will transfer ownership of all ports | |
621 | * from the companions to the EHCI controller. If any of the | |
622 | * companions are in the middle of a port reset at the time, it | |
623 | * could cause trouble. Write-locking ehci_cf_port_reset_rwsem | |
1cb52658 DB |
624 | * guarantees that no resets are in progress. After we set CF, |
625 | * a short delay lets the hardware catch up; new resets shouldn't | |
626 | * be started before the port switching actions could complete. | |
1da177e4 | 627 | */ |
32fe0198 | 628 | down_write(&ehci_cf_port_reset_rwsem); |
e8799906 | 629 | ehci->rh_state = EHCI_RH_RUNNING; |
083522d7 BH |
630 | ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag); |
631 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ | |
1cb52658 | 632 | msleep(5); |
32fe0198 | 633 | up_write(&ehci_cf_port_reset_rwsem); |
ee4ecb8a | 634 | ehci->last_periodic_enable = ktime_get_real(); |
1da177e4 | 635 | |
c430131a | 636 | temp = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)); |
1da177e4 | 637 | ehci_info (ehci, |
2b70f073 | 638 | "USB %x.%x started, EHCI %x.%02x%s\n", |
7ff71d6a | 639 | ((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f), |
2b70f073 | 640 | temp >> 8, temp & 0xff, |
93f1a47c | 641 | ignore_oc ? ", overcurrent ignored" : ""); |
1da177e4 | 642 | |
083522d7 BH |
643 | ehci_writel(ehci, INTR_MASK, |
644 | &ehci->regs->intr_enable); /* Turn On Interrupts */ | |
1da177e4 | 645 | |
18807521 DB |
646 | /* GRR this is run-once init(), being done every time the HC starts. |
647 | * So long as they're part of class devices, we can't do it init() | |
648 | * since the class device isn't created that early. | |
649 | */ | |
650 | create_debug_files(ehci); | |
4c67045b | 651 | create_sysfs_files(ehci); |
1da177e4 LT |
652 | |
653 | return 0; | |
654 | } | |
655 | ||
3e023203 | 656 | int ehci_setup(struct usb_hcd *hcd) |
2093c6b4 MC |
657 | { |
658 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
659 | int retval; | |
660 | ||
661 | ehci->regs = (void __iomem *)ehci->caps + | |
662 | HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)); | |
663 | dbg_hcs_params(ehci, "reset"); | |
664 | dbg_hcc_params(ehci, "reset"); | |
665 | ||
666 | /* cache this readonly data; minimize chip reads */ | |
667 | ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); | |
668 | ||
669 | ehci->sbrn = HCD_USB2; | |
670 | ||
631fe9d9 AS |
671 | /* data structure init */ |
672 | retval = ehci_init(hcd); | |
2093c6b4 MC |
673 | if (retval) |
674 | return retval; | |
675 | ||
631fe9d9 | 676 | retval = ehci_halt(ehci); |
2093c6b4 MC |
677 | if (retval) |
678 | return retval; | |
679 | ||
680 | ehci_reset(ehci); | |
681 | ||
682 | return 0; | |
683 | } | |
3e023203 | 684 | EXPORT_SYMBOL_GPL(ehci_setup); |
2093c6b4 | 685 | |
1da177e4 LT |
686 | /*-------------------------------------------------------------------------*/ |
687 | ||
7d12e780 | 688 | static irqreturn_t ehci_irq (struct usb_hcd *hcd) |
1da177e4 LT |
689 | { |
690 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
67b2e029 | 691 | u32 status, masked_status, pcd_status = 0, cmd; |
1da177e4 | 692 | int bh; |
a1227f3c | 693 | unsigned long flags; |
1da177e4 | 694 | |
a1227f3c SG |
695 | /* |
696 | * For threadirqs option we use spin_lock_irqsave() variant to prevent | |
697 | * deadlock with ehci hrtimer callback, because hrtimer callbacks run | |
698 | * in interrupt context even when threadirqs is specified. We can go | |
699 | * back to spin_lock() variant when hrtimer callbacks become threaded. | |
700 | */ | |
701 | spin_lock_irqsave(&ehci->lock, flags); | |
1da177e4 | 702 | |
083522d7 | 703 | status = ehci_readl(ehci, &ehci->regs->status); |
1da177e4 LT |
704 | |
705 | /* e.g. cardbus physical eject */ | |
706 | if (status == ~(u32) 0) { | |
707 | ehci_dbg (ehci, "device removed\n"); | |
708 | goto dead; | |
709 | } | |
710 | ||
2fbe2bf1 AS |
711 | /* |
712 | * We don't use STS_FLR, but some controllers don't like it to | |
713 | * remain on, so mask it out along with the other status bits. | |
714 | */ | |
715 | masked_status = status & (INTR_MASK | STS_FLR); | |
716 | ||
69fff59d | 717 | /* Shared IRQ? */ |
e8799906 | 718 | if (!masked_status || unlikely(ehci->rh_state == EHCI_RH_HALTED)) { |
a1227f3c | 719 | spin_unlock_irqrestore(&ehci->lock, flags); |
1da177e4 LT |
720 | return IRQ_NONE; |
721 | } | |
722 | ||
723 | /* clear (just) interrupts */ | |
67b2e029 | 724 | ehci_writel(ehci, masked_status, &ehci->regs->status); |
e82cc128 | 725 | cmd = ehci_readl(ehci, &ehci->regs->command); |
1da177e4 LT |
726 | bh = 0; |
727 | ||
1da177e4 LT |
728 | /* normal [4.15.1.2] or error [4.15.1.1] completion */ |
729 | if (likely ((status & (STS_INT|STS_ERR)) != 0)) { | |
730 | if (likely ((status & STS_ERR) == 0)) | |
731 | COUNT (ehci->stats.normal); | |
732 | else | |
733 | COUNT (ehci->stats.error); | |
734 | bh = 1; | |
735 | } | |
736 | ||
737 | /* complete the unlinking of some qh [4.15.2.3] */ | |
738 | if (status & STS_IAA) { | |
9d938747 AS |
739 | |
740 | /* Turn off the IAA watchdog */ | |
741 | ehci->enabled_hrtimer_events &= ~BIT(EHCI_HRTIMER_IAA_WATCHDOG); | |
742 | ||
743 | /* | |
744 | * Mild optimization: Allow another IAAD to reset the | |
745 | * hrtimer, if one occurs before the next expiration. | |
746 | * In theory we could always cancel the hrtimer, but | |
747 | * tests show that about half the time it will be reset | |
748 | * for some other event anyway. | |
749 | */ | |
750 | if (ehci->next_hrtimer_event == EHCI_HRTIMER_IAA_WATCHDOG) | |
751 | ++ehci->next_hrtimer_event; | |
752 | ||
e82cc128 | 753 | /* guard against (alleged) silicon errata */ |
6feff1b9 | 754 | if (cmd & CMD_IAAD) |
e82cc128 | 755 | ehci_dbg(ehci, "IAA with IAAD still set?\n"); |
214ac7a0 | 756 | if (ehci->iaa_in_progress) |
99ac5b1e | 757 | COUNT(ehci->stats.iaa); |
6402c796 | 758 | end_unlink_async(ehci); |
1da177e4 LT |
759 | } |
760 | ||
761 | /* remote wakeup [4.3.1] */ | |
d97cc2f2 | 762 | if (status & STS_PCD) { |
1da177e4 | 763 | unsigned i = HCS_N_PORTS (ehci->hcs_params); |
4dd405a4 | 764 | u32 ppcd = ~0; |
d1b1842c DB |
765 | |
766 | /* kick root hub later */ | |
1d619f12 | 767 | pcd_status = status; |
1da177e4 LT |
768 | |
769 | /* resume root hub? */ | |
dc75ce9d | 770 | if (ehci->rh_state == EHCI_RH_SUSPENDED) |
8c03356a | 771 | usb_hcd_resume_root_hub(hcd); |
1da177e4 | 772 | |
5a9cdf33 AD |
773 | /* get per-port change detect bits */ |
774 | if (ehci->has_ppcd) | |
775 | ppcd = status >> 16; | |
776 | ||
1da177e4 | 777 | while (i--) { |
5a9cdf33 AD |
778 | int pstatus; |
779 | ||
780 | /* leverage per-port change bits feature */ | |
4dd405a4 | 781 | if (!(ppcd & (1 << i))) |
5a9cdf33 AD |
782 | continue; |
783 | pstatus = ehci_readl(ehci, | |
784 | &ehci->regs->port_status[i]); | |
b972b68c DB |
785 | |
786 | if (pstatus & PORT_OWNER) | |
1da177e4 | 787 | continue; |
eafe5b99 AS |
788 | if (!(test_bit(i, &ehci->suspended_ports) && |
789 | ((pstatus & PORT_RESUME) || | |
790 | !(pstatus & PORT_SUSPEND)) && | |
791 | (pstatus & PORT_PE) && | |
792 | ehci->reset_done[i] == 0)) | |
1da177e4 LT |
793 | continue; |
794 | ||
ea16328f FB |
795 | /* start USB_RESUME_TIMEOUT msec resume signaling from |
796 | * this port, and make hub_wq collect | |
797 | * PORT_STAT_C_SUSPEND to stop that signaling. | |
1da177e4 | 798 | */ |
ea16328f FB |
799 | ehci->reset_done[i] = jiffies + |
800 | msecs_to_jiffies(USB_RESUME_TIMEOUT); | |
a448e4dc | 801 | set_bit(i, &ehci->resuming_ports); |
1da177e4 | 802 | ehci_dbg (ehci, "port %d remote wakeup\n", i + 1); |
f292e7f9 | 803 | usb_hcd_start_port_resume(&hcd->self, i); |
61e8b858 | 804 | mod_timer(&hcd->rh_timer, ehci->reset_done[i]); |
1da177e4 LT |
805 | } |
806 | } | |
807 | ||
808 | /* PCI errors [4.15.2.4] */ | |
809 | if (unlikely ((status & STS_FATAL) != 0)) { | |
67b2e029 | 810 | ehci_err(ehci, "fatal error\n"); |
eafe5b99 AS |
811 | dbg_cmd(ehci, "fatal", cmd); |
812 | dbg_status(ehci, "fatal", status); | |
1da177e4 | 813 | dead: |
69fff59d | 814 | usb_hc_died(hcd); |
bf6387bc AS |
815 | |
816 | /* Don't let the controller do anything more */ | |
43fe3a99 | 817 | ehci->shutdown = true; |
bf6387bc AS |
818 | ehci->rh_state = EHCI_RH_STOPPING; |
819 | ehci->command &= ~(CMD_RUN | CMD_ASE | CMD_PSE); | |
820 | ehci_writel(ehci, ehci->command, &ehci->regs->command); | |
821 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); | |
822 | ehci_handle_controller_death(ehci); | |
823 | ||
824 | /* Handle completions when the controller stops */ | |
825 | bh = 0; | |
1da177e4 LT |
826 | } |
827 | ||
828 | if (bh) | |
7d12e780 | 829 | ehci_work (ehci); |
a1227f3c | 830 | spin_unlock_irqrestore(&ehci->lock, flags); |
d1b1842c | 831 | if (pcd_status) |
1d619f12 | 832 | usb_hcd_poll_rh_status(hcd); |
1da177e4 LT |
833 | return IRQ_HANDLED; |
834 | } | |
835 | ||
836 | /*-------------------------------------------------------------------------*/ | |
837 | ||
838 | /* | |
839 | * non-error returns are a promise to giveback() the urb later | |
840 | * we drop ownership so next owner (or urb unlink) can get it | |
841 | * | |
842 | * urb + dev is in hcd.self.controller.urb_list | |
843 | * we're queueing TDs onto software and hardware lists | |
844 | * | |
845 | * hcd-specific init for hcpriv hasn't been done yet | |
846 | * | |
847 | * NOTE: control, bulk, and interrupt share the same code to append TDs | |
848 | * to a (possibly active) QH, and the same QH scanning code. | |
849 | */ | |
850 | static int ehci_urb_enqueue ( | |
851 | struct usb_hcd *hcd, | |
1da177e4 | 852 | struct urb *urb, |
55016f10 | 853 | gfp_t mem_flags |
1da177e4 LT |
854 | ) { |
855 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
856 | struct list_head qtd_list; | |
857 | ||
858 | INIT_LIST_HEAD (&qtd_list); | |
859 | ||
860 | switch (usb_pipetype (urb->pipe)) { | |
25b70a86 DB |
861 | case PIPE_CONTROL: |
862 | /* qh_completions() code doesn't handle all the fault cases | |
863 | * in multi-TD control transfers. Even 1KB is rare anyway. | |
864 | */ | |
865 | if (urb->transfer_buffer_length > (16 * 1024)) | |
866 | return -EMSGSIZE; | |
867 | /* FALLTHROUGH */ | |
868 | /* case PIPE_BULK: */ | |
1da177e4 LT |
869 | default: |
870 | if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags)) | |
871 | return -ENOMEM; | |
e9df41c5 | 872 | return submit_async(ehci, urb, &qtd_list, mem_flags); |
1da177e4 LT |
873 | |
874 | case PIPE_INTERRUPT: | |
875 | if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags)) | |
876 | return -ENOMEM; | |
e9df41c5 | 877 | return intr_submit(ehci, urb, &qtd_list, mem_flags); |
1da177e4 LT |
878 | |
879 | case PIPE_ISOCHRONOUS: | |
880 | if (urb->dev->speed == USB_SPEED_HIGH) | |
881 | return itd_submit (ehci, urb, mem_flags); | |
882 | else | |
883 | return sitd_submit (ehci, urb, mem_flags); | |
884 | } | |
885 | } | |
886 | ||
1da177e4 LT |
887 | /* remove from hardware lists |
888 | * completions normally happen asynchronously | |
889 | */ | |
890 | ||
e9df41c5 | 891 | static int ehci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
1da177e4 LT |
892 | { |
893 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
894 | struct ehci_qh *qh; | |
895 | unsigned long flags; | |
e9df41c5 | 896 | int rc; |
1da177e4 LT |
897 | |
898 | spin_lock_irqsave (&ehci->lock, flags); | |
e9df41c5 AS |
899 | rc = usb_hcd_check_unlink_urb(hcd, urb, status); |
900 | if (rc) | |
901 | goto done; | |
902 | ||
7655e316 AS |
903 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { |
904 | /* | |
905 | * We don't expedite dequeue for isochronous URBs. | |
906 | * Just wait until they complete normally or their | |
907 | * time slot expires. | |
908 | */ | |
909 | } else { | |
1da177e4 | 910 | qh = (struct ehci_qh *) urb->hcpriv; |
7bc782d7 | 911 | qh->exception = 1; |
07d29b63 AS |
912 | switch (qh->qh_state) { |
913 | case QH_STATE_LINKED: | |
7655e316 AS |
914 | if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT) |
915 | start_unlink_intr(ehci, qh); | |
916 | else | |
917 | start_unlink_async(ehci, qh); | |
07d29b63 | 918 | break; |
7bc782d7 AS |
919 | case QH_STATE_COMPLETING: |
920 | qh->dequeue_during_giveback = 1; | |
921 | break; | |
07d29b63 AS |
922 | case QH_STATE_UNLINK: |
923 | case QH_STATE_UNLINK_WAIT: | |
924 | /* already started */ | |
925 | break; | |
926 | case QH_STATE_IDLE: | |
7a0f0d95 AS |
927 | /* QH might be waiting for a Clear-TT-Buffer */ |
928 | qh_completions(ehci, qh); | |
07d29b63 AS |
929 | break; |
930 | } | |
1da177e4 LT |
931 | } |
932 | done: | |
933 | spin_unlock_irqrestore (&ehci->lock, flags); | |
e9df41c5 | 934 | return rc; |
1da177e4 LT |
935 | } |
936 | ||
937 | /*-------------------------------------------------------------------------*/ | |
938 | ||
939 | // bulk qh holds the data toggle | |
940 | ||
941 | static void | |
942 | ehci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep) | |
943 | { | |
944 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
945 | unsigned long flags; | |
35371e4f | 946 | struct ehci_qh *qh; |
1da177e4 LT |
947 | |
948 | /* ASSERT: any requests/urbs are being unlinked */ | |
949 | /* ASSERT: nobody can be submitting urbs for this any more */ | |
950 | ||
951 | rescan: | |
952 | spin_lock_irqsave (&ehci->lock, flags); | |
953 | qh = ep->hcpriv; | |
954 | if (!qh) | |
955 | goto done; | |
956 | ||
957 | /* endpoints can be iso streams. for now, we don't | |
958 | * accelerate iso completions ... so spin a while. | |
959 | */ | |
1082f57a | 960 | if (qh->hw == NULL) { |
8c5bf7be AS |
961 | struct ehci_iso_stream *stream = ep->hcpriv; |
962 | ||
963 | if (!list_empty(&stream->td_list)) | |
964 | goto idle_timeout; | |
965 | ||
966 | /* BUG_ON(!list_empty(&stream->free_list)); */ | |
d0ce5c6b | 967 | reserve_release_iso_bandwidth(ehci, stream, -1); |
8c5bf7be AS |
968 | kfree(stream); |
969 | goto done; | |
1da177e4 LT |
970 | } |
971 | ||
7bc782d7 | 972 | qh->exception = 1; |
1da177e4 LT |
973 | switch (qh->qh_state) { |
974 | case QH_STATE_LINKED: | |
35371e4f ML |
975 | WARN_ON(!list_empty(&qh->qtd_list)); |
976 | if (usb_endpoint_type(&ep->desc) != USB_ENDPOINT_XFER_INT) | |
3c273a05 | 977 | start_unlink_async(ehci, qh); |
35371e4f ML |
978 | else |
979 | start_unlink_intr(ehci, qh); | |
1da177e4 | 980 | /* FALL THROUGH */ |
35371e4f | 981 | case QH_STATE_COMPLETING: /* already in unlinking */ |
1da177e4 | 982 | case QH_STATE_UNLINK: /* wait for hw to finish? */ |
07d29b63 | 983 | case QH_STATE_UNLINK_WAIT: |
1da177e4 LT |
984 | idle_timeout: |
985 | spin_unlock_irqrestore (&ehci->lock, flags); | |
22c43863 | 986 | schedule_timeout_uninterruptible(1); |
1da177e4 LT |
987 | goto rescan; |
988 | case QH_STATE_IDLE: /* fully unlinked */ | |
914b7012 AS |
989 | if (qh->clearing_tt) |
990 | goto idle_timeout; | |
1da177e4 | 991 | if (list_empty (&qh->qtd_list)) { |
d0ce5c6b AS |
992 | if (qh->ps.bw_uperiod) |
993 | reserve_release_intr_bandwidth(ehci, qh, -1); | |
c83e1a9f | 994 | qh_destroy(ehci, qh); |
1da177e4 LT |
995 | break; |
996 | } | |
997 | /* else FALL THROUGH */ | |
998 | default: | |
1da177e4 LT |
999 | /* caller was supposed to have unlinked any requests; |
1000 | * that's not our job. just leak this memory. | |
1001 | */ | |
1002 | ehci_err (ehci, "qh %p (#%02x) state %d%s\n", | |
1003 | qh, ep->desc.bEndpointAddress, qh->qh_state, | |
1004 | list_empty (&qh->qtd_list) ? "" : "(has tds)"); | |
1005 | break; | |
1006 | } | |
8c5bf7be | 1007 | done: |
1da177e4 | 1008 | ep->hcpriv = NULL; |
1da177e4 | 1009 | spin_unlock_irqrestore (&ehci->lock, flags); |
1da177e4 LT |
1010 | } |
1011 | ||
b18ffd49 AS |
1012 | static void |
1013 | ehci_endpoint_reset(struct usb_hcd *hcd, struct usb_host_endpoint *ep) | |
1014 | { | |
1015 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1016 | struct ehci_qh *qh; | |
1017 | int eptype = usb_endpoint_type(&ep->desc); | |
a455212d AS |
1018 | int epnum = usb_endpoint_num(&ep->desc); |
1019 | int is_out = usb_endpoint_dir_out(&ep->desc); | |
1020 | unsigned long flags; | |
b18ffd49 AS |
1021 | |
1022 | if (eptype != USB_ENDPOINT_XFER_BULK && eptype != USB_ENDPOINT_XFER_INT) | |
1023 | return; | |
1024 | ||
a455212d | 1025 | spin_lock_irqsave(&ehci->lock, flags); |
b18ffd49 AS |
1026 | qh = ep->hcpriv; |
1027 | ||
1028 | /* For Bulk and Interrupt endpoints we maintain the toggle state | |
1029 | * in the hardware; the toggle bits in udev aren't used at all. | |
1030 | * When an endpoint is reset by usb_clear_halt() we must reset | |
1031 | * the toggle bit in the QH. | |
1032 | */ | |
1033 | if (qh) { | |
1034 | if (!list_empty(&qh->qtd_list)) { | |
1035 | WARN_ONCE(1, "clear_halt for a busy endpoint\n"); | |
7bc782d7 | 1036 | } else { |
a455212d AS |
1037 | /* The toggle value in the QH can't be updated |
1038 | * while the QH is active. Unlink it now; | |
1039 | * re-linking will call qh_refresh(). | |
b18ffd49 | 1040 | */ |
ffa0248e | 1041 | usb_settoggle(qh->ps.udev, epnum, is_out, 0); |
7bc782d7 | 1042 | qh->exception = 1; |
a448c9d8 | 1043 | if (eptype == USB_ENDPOINT_XFER_BULK) |
3c273a05 | 1044 | start_unlink_async(ehci, qh); |
a448c9d8 | 1045 | else |
df202255 | 1046 | start_unlink_intr(ehci, qh); |
b18ffd49 AS |
1047 | } |
1048 | } | |
a455212d | 1049 | spin_unlock_irqrestore(&ehci->lock, flags); |
b18ffd49 AS |
1050 | } |
1051 | ||
7ff71d6a MP |
1052 | static int ehci_get_frame (struct usb_hcd *hcd) |
1053 | { | |
1054 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
68aa95d5 | 1055 | return (ehci_read_frame_index(ehci) >> 3) % ehci->periodic_size; |
7ff71d6a | 1056 | } |
1da177e4 LT |
1057 | |
1058 | /*-------------------------------------------------------------------------*/ | |
c5cf9212 | 1059 | |
b35c5009 AS |
1060 | /* Device addition and removal */ |
1061 | ||
1062 | static void ehci_remove_device(struct usb_hcd *hcd, struct usb_device *udev) | |
1063 | { | |
1064 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1065 | ||
1066 | spin_lock_irq(&ehci->lock); | |
1067 | drop_tt(udev); | |
1068 | spin_unlock_irq(&ehci->lock); | |
1069 | } | |
1070 | ||
1071 | /*-------------------------------------------------------------------------*/ | |
1072 | ||
c5cf9212 AS |
1073 | #ifdef CONFIG_PM |
1074 | ||
1075 | /* suspend/resume, section 4.3 */ | |
1076 | ||
1077 | /* These routines handle the generic parts of controller suspend/resume */ | |
1078 | ||
3e023203 | 1079 | int ehci_suspend(struct usb_hcd *hcd, bool do_wakeup) |
c5cf9212 AS |
1080 | { |
1081 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1082 | ||
1083 | if (time_before(jiffies, ehci->next_statechange)) | |
1084 | msleep(10); | |
1085 | ||
1086 | /* | |
1087 | * Root hub was already suspended. Disable IRQ emission and | |
1088 | * mark HW unaccessible. The PM and USB cores make sure that | |
1089 | * the root hub is either suspended or stopped. | |
1090 | */ | |
1091 | ehci_prepare_ports_for_controller_suspend(ehci, do_wakeup); | |
1092 | ||
1093 | spin_lock_irq(&ehci->lock); | |
1094 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); | |
1095 | (void) ehci_readl(ehci, &ehci->regs->intr_enable); | |
1096 | ||
1097 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
1098 | spin_unlock_irq(&ehci->lock); | |
1099 | ||
b8efdafb AS |
1100 | synchronize_irq(hcd->irq); |
1101 | ||
1102 | /* Check for race with a wakeup request */ | |
1103 | if (do_wakeup && HCD_WAKEUP_PENDING(hcd)) { | |
1104 | ehci_resume(hcd, false); | |
1105 | return -EBUSY; | |
1106 | } | |
1107 | ||
c5cf9212 AS |
1108 | return 0; |
1109 | } | |
3e023203 | 1110 | EXPORT_SYMBOL_GPL(ehci_suspend); |
c5cf9212 AS |
1111 | |
1112 | /* Returns 0 if power was preserved, 1 if power was lost */ | |
314b41b1 | 1113 | int ehci_resume(struct usb_hcd *hcd, bool force_reset) |
c5cf9212 AS |
1114 | { |
1115 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
1116 | ||
1117 | if (time_before(jiffies, ehci->next_statechange)) | |
1118 | msleep(100); | |
1119 | ||
1120 | /* Mark hardware accessible again as we are back to full power by now */ | |
1121 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
1122 | ||
43fe3a99 AS |
1123 | if (ehci->shutdown) |
1124 | return 0; /* Controller is dead */ | |
1125 | ||
c5cf9212 | 1126 | /* |
314b41b1 | 1127 | * If CF is still set and reset isn't forced |
c5cf9212 AS |
1128 | * then we maintained suspend power. |
1129 | * Just undo the effect of ehci_suspend(). | |
1130 | */ | |
1131 | if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF && | |
314b41b1 | 1132 | !force_reset) { |
c5cf9212 AS |
1133 | int mask = INTR_MASK; |
1134 | ||
1135 | ehci_prepare_ports_for_controller_resume(ehci); | |
43fe3a99 AS |
1136 | |
1137 | spin_lock_irq(&ehci->lock); | |
1138 | if (ehci->shutdown) | |
1139 | goto skip; | |
1140 | ||
c5cf9212 AS |
1141 | if (!hcd->self.root_hub->do_remote_wakeup) |
1142 | mask &= ~STS_PCD; | |
1143 | ehci_writel(ehci, mask, &ehci->regs->intr_enable); | |
1144 | ehci_readl(ehci, &ehci->regs->intr_enable); | |
43fe3a99 AS |
1145 | skip: |
1146 | spin_unlock_irq(&ehci->lock); | |
c5cf9212 AS |
1147 | return 0; |
1148 | } | |
1149 | ||
1150 | /* | |
1151 | * Else reset, to cope with power loss or resume from hibernation | |
1152 | * having let the firmware kick in during reboot. | |
1153 | */ | |
1154 | usb_root_hub_lost_power(hcd->self.root_hub); | |
1155 | (void) ehci_halt(ehci); | |
1156 | (void) ehci_reset(ehci); | |
1157 | ||
43fe3a99 AS |
1158 | spin_lock_irq(&ehci->lock); |
1159 | if (ehci->shutdown) | |
1160 | goto skip; | |
1161 | ||
c5cf9212 AS |
1162 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
1163 | ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag); | |
1164 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ | |
1165 | ||
43fe3a99 AS |
1166 | ehci->rh_state = EHCI_RH_SUSPENDED; |
1167 | spin_unlock_irq(&ehci->lock); | |
1168 | ||
c5cf9212 AS |
1169 | return 1; |
1170 | } | |
3e023203 | 1171 | EXPORT_SYMBOL_GPL(ehci_resume); |
c5cf9212 AS |
1172 | |
1173 | #endif | |
1174 | ||
1175 | /*-------------------------------------------------------------------------*/ | |
1176 | ||
3e023203 AS |
1177 | /* |
1178 | * Generic structure: This gets copied for platform drivers so that | |
1179 | * individual entries can be overridden as needed. | |
1180 | */ | |
1181 | ||
1182 | static const struct hc_driver ehci_hc_driver = { | |
1183 | .description = hcd_name, | |
1184 | .product_desc = "EHCI Host Controller", | |
1185 | .hcd_priv_size = sizeof(struct ehci_hcd), | |
1186 | ||
1187 | /* | |
1188 | * generic hardware linkage | |
1189 | */ | |
1190 | .irq = ehci_irq, | |
c04ee4b1 | 1191 | .flags = HCD_MEMORY | HCD_USB2 | HCD_BH, |
3e023203 AS |
1192 | |
1193 | /* | |
1194 | * basic lifecycle operations | |
1195 | */ | |
1196 | .reset = ehci_setup, | |
1197 | .start = ehci_run, | |
1198 | .stop = ehci_stop, | |
1199 | .shutdown = ehci_shutdown, | |
1200 | ||
1201 | /* | |
1202 | * managing i/o requests and associated device resources | |
1203 | */ | |
1204 | .urb_enqueue = ehci_urb_enqueue, | |
1205 | .urb_dequeue = ehci_urb_dequeue, | |
1206 | .endpoint_disable = ehci_endpoint_disable, | |
1207 | .endpoint_reset = ehci_endpoint_reset, | |
1208 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, | |
1209 | ||
1210 | /* | |
1211 | * scheduling support | |
1212 | */ | |
1213 | .get_frame_number = ehci_get_frame, | |
1214 | ||
1215 | /* | |
1216 | * root hub support | |
1217 | */ | |
1218 | .hub_status_data = ehci_hub_status_data, | |
1219 | .hub_control = ehci_hub_control, | |
1220 | .bus_suspend = ehci_bus_suspend, | |
1221 | .bus_resume = ehci_bus_resume, | |
1222 | .relinquish_port = ehci_relinquish_port, | |
1223 | .port_handed_over = ehci_port_handed_over, | |
b35c5009 AS |
1224 | |
1225 | /* | |
1226 | * device support | |
1227 | */ | |
1228 | .free_dev = ehci_remove_device, | |
3e023203 AS |
1229 | }; |
1230 | ||
1231 | void ehci_init_driver(struct hc_driver *drv, | |
1232 | const struct ehci_driver_overrides *over) | |
1233 | { | |
1234 | /* Copy the generic table to drv and then apply the overrides */ | |
1235 | *drv = ehci_hc_driver; | |
1236 | ||
1b36810e AS |
1237 | if (over) { |
1238 | drv->hcd_priv_size += over->extra_priv_size; | |
1239 | if (over->reset) | |
1240 | drv->reset = over->reset; | |
11a7e594 MG |
1241 | if (over->port_power) |
1242 | drv->port_power = over->port_power; | |
1b36810e | 1243 | } |
3e023203 AS |
1244 | } |
1245 | EXPORT_SYMBOL_GPL(ehci_init_driver); | |
1246 | ||
1247 | /*-------------------------------------------------------------------------*/ | |
1248 | ||
2b70f073 | 1249 | MODULE_DESCRIPTION(DRIVER_DESC); |
1da177e4 LT |
1250 | MODULE_AUTHOR (DRIVER_AUTHOR); |
1251 | MODULE_LICENSE ("GPL"); | |
1252 | ||
ba02978a | 1253 | #ifdef CONFIG_USB_EHCI_FSL |
80cb9aee | 1254 | #include "ehci-fsl.c" |
01cced25 | 1255 | #define PLATFORM_DRIVER ehci_fsl_driver |
80cb9aee RV |
1256 | #endif |
1257 | ||
60b0bf0f | 1258 | #ifdef CONFIG_USB_EHCI_SH |
63c84552 PM |
1259 | #include "ehci-sh.c" |
1260 | #define PLATFORM_DRIVER ehci_hcd_sh_driver | |
1261 | #endif | |
1262 | ||
ad75a410 GL |
1263 | #ifdef CONFIG_PPC_PS3 |
1264 | #include "ehci-ps3.c" | |
7a4eb7fd | 1265 | #define PS3_SYSTEM_BUS_DRIVER ps3_ehci_driver |
ad75a410 GL |
1266 | #endif |
1267 | ||
da0e8fb0 VB |
1268 | #ifdef CONFIG_USB_EHCI_HCD_PPC_OF |
1269 | #include "ehci-ppc-of.c" | |
1270 | #define OF_PLATFORM_DRIVER ehci_hcd_ppc_of_driver | |
1271 | #endif | |
1272 | ||
08d3c18e JZ |
1273 | #ifdef CONFIG_XPS_USB_HCD_XILINX |
1274 | #include "ehci-xilinx-of.c" | |
1f23b2d9 | 1275 | #define XILINX_OF_PLATFORM_DRIVER ehci_hcd_xilinx_of_driver |
08d3c18e JZ |
1276 | #endif |
1277 | ||
47fc28bf CM |
1278 | #ifdef CONFIG_TILE_USB |
1279 | #include "ehci-tilegx.c" | |
1280 | #define PLATFORM_DRIVER ehci_hcd_tilegx_driver | |
1281 | #endif | |
1282 | ||
22ced687 A |
1283 | #ifdef CONFIG_USB_EHCI_HCD_PMC_MSP |
1284 | #include "ehci-pmcmsp.c" | |
1285 | #define PLATFORM_DRIVER ehci_hcd_msp_driver | |
1286 | #endif | |
1287 | ||
9be03929 JA |
1288 | #ifdef CONFIG_SPARC_LEON |
1289 | #include "ehci-grlib.c" | |
1290 | #define PLATFORM_DRIVER ehci_grlib_driver | |
1291 | #endif | |
1292 | ||
3a082ec9 NZ |
1293 | #ifdef CONFIG_USB_EHCI_MV |
1294 | #include "ehci-mv.c" | |
1295 | #define PLATFORM_DRIVER ehci_mv_driver | |
1296 | #endif | |
f30cdbcb | 1297 | |
c256667f SH |
1298 | #ifdef CONFIG_MIPS_SEAD3 |
1299 | #include "ehci-sead3.c" | |
1300 | #define PLATFORM_DRIVER ehci_hcd_sead3_driver | |
1301 | #endif | |
1302 | ||
01cced25 KG |
1303 | static int __init ehci_hcd_init(void) |
1304 | { | |
1305 | int retval = 0; | |
1306 | ||
2b70f073 AS |
1307 | if (usb_disabled()) |
1308 | return -ENODEV; | |
1309 | ||
1310 | printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name); | |
9beeee65 AS |
1311 | set_bit(USB_EHCI_LOADED, &usb_hcds_loaded); |
1312 | if (test_bit(USB_UHCI_LOADED, &usb_hcds_loaded) || | |
1313 | test_bit(USB_OHCI_LOADED, &usb_hcds_loaded)) | |
1314 | printk(KERN_WARNING "Warning! ehci_hcd should always be loaded" | |
1315 | " before uhci_hcd and ohci_hcd, not after\n"); | |
1316 | ||
01cced25 KG |
1317 | pr_debug("%s: block sizes: qh %Zd qtd %Zd itd %Zd sitd %Zd\n", |
1318 | hcd_name, | |
1319 | sizeof(struct ehci_qh), sizeof(struct ehci_qtd), | |
1320 | sizeof(struct ehci_itd), sizeof(struct ehci_sitd)); | |
1321 | ||
1c20163d | 1322 | #ifdef CONFIG_DYNAMIC_DEBUG |
08f4e586 | 1323 | ehci_debug_root = debugfs_create_dir("ehci", usb_debug_root); |
9beeee65 AS |
1324 | if (!ehci_debug_root) { |
1325 | retval = -ENOENT; | |
1326 | goto err_debug; | |
1327 | } | |
694cc208 TJ |
1328 | #endif |
1329 | ||
01cced25 KG |
1330 | #ifdef PLATFORM_DRIVER |
1331 | retval = platform_driver_register(&PLATFORM_DRIVER); | |
da0e8fb0 VB |
1332 | if (retval < 0) |
1333 | goto clean0; | |
01cced25 KG |
1334 | #endif |
1335 | ||
ad75a410 | 1336 | #ifdef PS3_SYSTEM_BUS_DRIVER |
7a4eb7fd | 1337 | retval = ps3_ehci_driver_register(&PS3_SYSTEM_BUS_DRIVER); |
da0e8fb0 VB |
1338 | if (retval < 0) |
1339 | goto clean2; | |
694cc208 | 1340 | #endif |
da0e8fb0 VB |
1341 | |
1342 | #ifdef OF_PLATFORM_DRIVER | |
d35fb641 | 1343 | retval = platform_driver_register(&OF_PLATFORM_DRIVER); |
da0e8fb0 VB |
1344 | if (retval < 0) |
1345 | goto clean3; | |
1346 | #endif | |
1f23b2d9 GL |
1347 | |
1348 | #ifdef XILINX_OF_PLATFORM_DRIVER | |
d35fb641 | 1349 | retval = platform_driver_register(&XILINX_OF_PLATFORM_DRIVER); |
1f23b2d9 GL |
1350 | if (retval < 0) |
1351 | goto clean4; | |
1352 | #endif | |
da0e8fb0 VB |
1353 | return retval; |
1354 | ||
1f23b2d9 | 1355 | #ifdef XILINX_OF_PLATFORM_DRIVER |
d35fb641 | 1356 | /* platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER); */ |
1f23b2d9 GL |
1357 | clean4: |
1358 | #endif | |
da0e8fb0 | 1359 | #ifdef OF_PLATFORM_DRIVER |
d35fb641 | 1360 | platform_driver_unregister(&OF_PLATFORM_DRIVER); |
da0e8fb0 VB |
1361 | clean3: |
1362 | #endif | |
1363 | #ifdef PS3_SYSTEM_BUS_DRIVER | |
1364 | ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER); | |
1365 | clean2: | |
ad75a410 | 1366 | #endif |
da0e8fb0 VB |
1367 | #ifdef PLATFORM_DRIVER |
1368 | platform_driver_unregister(&PLATFORM_DRIVER); | |
1369 | clean0: | |
1370 | #endif | |
1c20163d | 1371 | #ifdef CONFIG_DYNAMIC_DEBUG |
da0e8fb0 VB |
1372 | debugfs_remove(ehci_debug_root); |
1373 | ehci_debug_root = NULL; | |
9beeee65 | 1374 | err_debug: |
a9b6148d | 1375 | #endif |
9beeee65 | 1376 | clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded); |
01cced25 KG |
1377 | return retval; |
1378 | } | |
1379 | module_init(ehci_hcd_init); | |
1380 | ||
1381 | static void __exit ehci_hcd_cleanup(void) | |
1382 | { | |
1f23b2d9 | 1383 | #ifdef XILINX_OF_PLATFORM_DRIVER |
d35fb641 | 1384 | platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER); |
1f23b2d9 | 1385 | #endif |
da0e8fb0 | 1386 | #ifdef OF_PLATFORM_DRIVER |
d35fb641 | 1387 | platform_driver_unregister(&OF_PLATFORM_DRIVER); |
da0e8fb0 | 1388 | #endif |
01cced25 KG |
1389 | #ifdef PLATFORM_DRIVER |
1390 | platform_driver_unregister(&PLATFORM_DRIVER); | |
1391 | #endif | |
ad75a410 | 1392 | #ifdef PS3_SYSTEM_BUS_DRIVER |
7a4eb7fd | 1393 | ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER); |
ad75a410 | 1394 | #endif |
1c20163d | 1395 | #ifdef CONFIG_DYNAMIC_DEBUG |
694cc208 TJ |
1396 | debugfs_remove(ehci_debug_root); |
1397 | #endif | |
9beeee65 | 1398 | clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded); |
01cced25 KG |
1399 | } |
1400 | module_exit(ehci_hcd_cleanup); |