2 * xHCI host controller driver
4 * Copyright (C) 2008 Intel Corp.
7 * Some code borrowed from the Linux EHCI driver.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
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
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.
23 #include <linux/irq.h>
24 #include <linux/module.h>
28 #define DRIVER_AUTHOR "Sarah Sharp"
29 #define DRIVER_DESC "'eXtensible' Host Controller (xHC) Driver"
31 /* TODO: copied from ehci-hcd.c - can this be refactored? */
33 * handshake - spin reading hc until handshake completes or fails
34 * @ptr: address of hc register to be read
35 * @mask: bits to look at in result of read
36 * @done: value of those bits when handshake succeeds
37 * @usec: timeout in microseconds
39 * Returns negative errno, or zero on success
41 * Success happens when the "mask" bits have the specified value (hardware
42 * handshake done). There are two failure modes: "usec" have passed (major
43 * hardware flakeout), or the register reads as all-ones (hardware removed).
45 static int handshake(struct xhci_hcd
*xhci
, void __iomem
*ptr
,
46 u32 mask
, u32 done
, int usec
)
51 result
= xhci_readl(xhci
, ptr
);
52 if (result
== ~(u32
)0) /* card removed */
64 * Force HC into halt state.
66 * Disable any IRQs and clear the run/stop bit.
67 * HC will complete any current and actively pipelined transactions, and
68 * should halt within 16 microframes of the run/stop bit being cleared.
69 * Read HC Halted bit in the status register to see when the HC is finished.
70 * XXX: shouldn't we set HC_STATE_HALT here somewhere?
72 int xhci_halt(struct xhci_hcd
*xhci
)
78 xhci_dbg(xhci
, "// Halt the HC\n");
79 /* Disable all interrupts from the host controller */
81 halted
= xhci_readl(xhci
, &xhci
->op_regs
->status
) & STS_HALT
;
85 cmd
= xhci_readl(xhci
, &xhci
->op_regs
->command
);
87 xhci_writel(xhci
, cmd
, &xhci
->op_regs
->command
);
89 return handshake(xhci
, &xhci
->op_regs
->status
,
90 STS_HALT
, STS_HALT
, XHCI_MAX_HALT_USEC
);
94 * Reset a halted HC, and set the internal HC state to HC_STATE_HALT.
96 * This resets pipelines, timers, counters, state machines, etc.
97 * Transactions will be terminated immediately, and operational registers
98 * will be set to their defaults.
100 int xhci_reset(struct xhci_hcd
*xhci
)
105 state
= xhci_readl(xhci
, &xhci
->op_regs
->status
);
106 BUG_ON((state
& STS_HALT
) == 0);
108 xhci_dbg(xhci
, "// Reset the HC\n");
109 command
= xhci_readl(xhci
, &xhci
->op_regs
->command
);
110 command
|= CMD_RESET
;
111 xhci_writel(xhci
, command
, &xhci
->op_regs
->command
);
112 /* XXX: Why does EHCI set this here? Shouldn't other code do this? */
113 xhci_to_hcd(xhci
)->state
= HC_STATE_HALT
;
115 return handshake(xhci
, &xhci
->op_regs
->command
, CMD_RESET
, 0, 250 * 1000);
119 * Stop the HC from processing the endpoint queues.
121 static void xhci_quiesce(struct xhci_hcd
*xhci
)
124 * Queues are per endpoint, so we need to disable an endpoint or slot.
126 * To disable a slot, we need to insert a disable slot command on the
127 * command ring and ring the doorbell. This will also free any internal
128 * resources associated with the slot (which might not be what we want).
130 * A Release Endpoint command sounds better - doesn't free internal HC
131 * memory, but removes the endpoints from the schedule and releases the
132 * bandwidth, disables the doorbells, and clears the endpoint enable
133 * flag. Usually used prior to a set interface command.
135 * TODO: Implement after command ring code is done.
137 BUG_ON(!HC_IS_RUNNING(xhci_to_hcd(xhci
)->state
));
138 xhci_dbg(xhci
, "Finished quiescing -- code not written yet\n");
142 /* Set up MSI-X table for entry 0 (may claim other entries later) */
143 static int xhci_setup_msix(struct xhci_hcd
*xhci
)
146 struct pci_dev
*pdev
= to_pci_dev(xhci_to_hcd(xhci
)->self
.controller
);
148 xhci
->msix_count
= 0;
149 /* XXX: did I do this right? ixgbe does kcalloc for more than one */
150 xhci
->msix_entries
= kmalloc(sizeof(struct msix_entry
), GFP_KERNEL
);
151 if (!xhci
->msix_entries
) {
152 xhci_err(xhci
, "Failed to allocate MSI-X entries\n");
155 xhci
->msix_entries
[0].entry
= 0;
157 ret
= pci_enable_msix(pdev
, xhci
->msix_entries
, xhci
->msix_count
);
159 xhci_err(xhci
, "Failed to enable MSI-X\n");
164 * Pass the xhci pointer value as the request_irq "cookie".
165 * If more irqs are added, this will need to be unique for each one.
167 ret
= request_irq(xhci
->msix_entries
[0].vector
, &xhci_irq
, 0,
168 "xHCI", xhci_to_hcd(xhci
));
170 xhci_err(xhci
, "Failed to allocate MSI-X interrupt\n");
173 xhci_dbg(xhci
, "Finished setting up MSI-X\n");
177 pci_disable_msix(pdev
);
179 kfree(xhci
->msix_entries
);
180 xhci
->msix_entries
= NULL
;
184 /* XXX: code duplication; can xhci_setup_msix call this? */
185 /* Free any IRQs and disable MSI-X */
186 static void xhci_cleanup_msix(struct xhci_hcd
*xhci
)
188 struct pci_dev
*pdev
= to_pci_dev(xhci_to_hcd(xhci
)->self
.controller
);
189 if (!xhci
->msix_entries
)
192 free_irq(xhci
->msix_entries
[0].vector
, xhci
);
193 pci_disable_msix(pdev
);
194 kfree(xhci
->msix_entries
);
195 xhci
->msix_entries
= NULL
;
196 xhci_dbg(xhci
, "Finished cleaning up MSI-X\n");
201 * Initialize memory for HCD and xHC (one-time init).
203 * Program the PAGESIZE register, initialize the device context array, create
204 * device contexts (?), set up a command ring segment (or two?), create event
205 * ring (one for now).
207 int xhci_init(struct usb_hcd
*hcd
)
209 struct xhci_hcd
*xhci
= hcd_to_xhci(hcd
);
212 xhci_dbg(xhci
, "xhci_init\n");
213 spin_lock_init(&xhci
->lock
);
214 retval
= xhci_mem_init(xhci
, GFP_KERNEL
);
215 xhci_dbg(xhci
, "Finished xhci_init\n");
221 * Called in interrupt context when there might be work
222 * queued on the event ring
224 * xhci->lock must be held by caller.
226 static void xhci_work(struct xhci_hcd
*xhci
)
232 * Clear the op reg interrupt status first,
233 * so we can receive interrupts from other MSI-X interrupters.
234 * Write 1 to clear the interrupt status.
236 temp
= xhci_readl(xhci
, &xhci
->op_regs
->status
);
238 xhci_writel(xhci
, temp
, &xhci
->op_regs
->status
);
239 /* FIXME when MSI-X is supported and there are multiple vectors */
240 /* Clear the MSI-X event interrupt status */
242 /* Acknowledge the interrupt */
243 temp
= xhci_readl(xhci
, &xhci
->ir_set
->irq_pending
);
245 xhci_writel(xhci
, temp
, &xhci
->ir_set
->irq_pending
);
246 /* Flush posted writes */
247 xhci_readl(xhci
, &xhci
->ir_set
->irq_pending
);
249 /* FIXME this should be a delayed service routine that clears the EHB */
250 xhci_handle_event(xhci
);
252 /* Clear the event handler busy flag; the event ring should be empty. */
253 temp_64
= xhci_read_64(xhci
, &xhci
->ir_set
->erst_dequeue
);
254 xhci_write_64(xhci
, temp_64
& ~ERST_EHB
, &xhci
->ir_set
->erst_dequeue
);
255 /* Flush posted writes -- FIXME is this necessary? */
256 xhci_readl(xhci
, &xhci
->ir_set
->irq_pending
);
259 /*-------------------------------------------------------------------------*/
262 * xHCI spec says we can get an interrupt, and if the HC has an error condition,
263 * we might get bad data out of the event ring. Section 4.10.2.7 has a list of
264 * indicators of an event TRB error, but we check the status *first* to be safe.
266 irqreturn_t
xhci_irq(struct usb_hcd
*hcd
)
268 struct xhci_hcd
*xhci
= hcd_to_xhci(hcd
);
271 spin_lock(&xhci
->lock
);
272 /* Check if the xHC generated the interrupt, or the irq is shared */
273 temp
= xhci_readl(xhci
, &xhci
->op_regs
->status
);
274 temp2
= xhci_readl(xhci
, &xhci
->ir_set
->irq_pending
);
275 if (!(temp
& STS_EINT
) && !ER_IRQ_PENDING(temp2
)) {
276 spin_unlock(&xhci
->lock
);
280 if (temp
& STS_FATAL
) {
281 xhci_warn(xhci
, "WARNING: Host System Error\n");
283 xhci_to_hcd(xhci
)->state
= HC_STATE_HALT
;
284 spin_unlock(&xhci
->lock
);
289 spin_unlock(&xhci
->lock
);
294 #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING
295 void xhci_event_ring_work(unsigned long arg
)
300 struct xhci_hcd
*xhci
= (struct xhci_hcd
*) arg
;
303 xhci_dbg(xhci
, "Poll event ring: %lu\n", jiffies
);
305 spin_lock_irqsave(&xhci
->lock
, flags
);
306 temp
= xhci_readl(xhci
, &xhci
->op_regs
->status
);
307 xhci_dbg(xhci
, "op reg status = 0x%x\n", temp
);
308 temp
= xhci_readl(xhci
, &xhci
->ir_set
->irq_pending
);
309 xhci_dbg(xhci
, "ir_set 0 pending = 0x%x\n", temp
);
310 xhci_dbg(xhci
, "No-op commands handled = %d\n", xhci
->noops_handled
);
311 xhci_dbg(xhci
, "HC error bitmask = 0x%x\n", xhci
->error_bitmask
);
312 xhci
->error_bitmask
= 0;
313 xhci_dbg(xhci
, "Event ring:\n");
314 xhci_debug_segment(xhci
, xhci
->event_ring
->deq_seg
);
315 xhci_dbg_ring_ptrs(xhci
, xhci
->event_ring
);
316 temp_64
= xhci_read_64(xhci
, &xhci
->ir_set
->erst_dequeue
);
317 temp_64
&= ~ERST_PTR_MASK
;
318 xhci_dbg(xhci
, "ERST deq = 64'h%0lx\n", (long unsigned int) temp_64
);
319 xhci_dbg(xhci
, "Command ring:\n");
320 xhci_debug_segment(xhci
, xhci
->cmd_ring
->deq_seg
);
321 xhci_dbg_ring_ptrs(xhci
, xhci
->cmd_ring
);
322 xhci_dbg_cmd_ptrs(xhci
);
323 for (i
= 0; i
< MAX_HC_SLOTS
; ++i
) {
325 for (j
= 0; j
< 31; ++j
) {
326 if (xhci
->devs
[i
]->ep_rings
[j
]) {
327 xhci_dbg(xhci
, "Dev %d endpoint ring %d:\n", i
, j
);
328 xhci_debug_segment(xhci
, xhci
->devs
[i
]->ep_rings
[j
]->deq_seg
);
334 if (xhci
->noops_submitted
!= NUM_TEST_NOOPS
)
335 if (xhci_setup_one_noop(xhci
))
336 xhci_ring_cmd_db(xhci
);
337 spin_unlock_irqrestore(&xhci
->lock
, flags
);
340 mod_timer(&xhci
->event_ring_timer
, jiffies
+ POLL_TIMEOUT
* HZ
);
342 xhci_dbg(xhci
, "Quit polling the event ring.\n");
347 * Start the HC after it was halted.
349 * This function is called by the USB core when the HC driver is added.
350 * Its opposite is xhci_stop().
352 * xhci_init() must be called once before this function can be called.
353 * Reset the HC, enable device slot contexts, program DCBAAP, and
354 * set command ring pointer and event ring pointer.
356 * Setup MSI-X vectors and enable interrupts.
358 int xhci_run(struct usb_hcd
*hcd
)
362 struct xhci_hcd
*xhci
= hcd_to_xhci(hcd
);
363 void (*doorbell
)(struct xhci_hcd
*) = NULL
;
365 hcd
->uses_new_polling
= 1;
368 xhci_dbg(xhci
, "xhci_run\n");
369 #if 0 /* FIXME: MSI not setup yet */
370 /* Do this at the very last minute */
371 ret
= xhci_setup_msix(xhci
);
377 #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING
378 init_timer(&xhci
->event_ring_timer
);
379 xhci
->event_ring_timer
.data
= (unsigned long) xhci
;
380 xhci
->event_ring_timer
.function
= xhci_event_ring_work
;
381 /* Poll the event ring */
382 xhci
->event_ring_timer
.expires
= jiffies
+ POLL_TIMEOUT
* HZ
;
384 xhci_dbg(xhci
, "Setting event ring polling timer\n");
385 add_timer(&xhci
->event_ring_timer
);
388 xhci_dbg(xhci
, "// Set the interrupt modulation register\n");
389 temp
= xhci_readl(xhci
, &xhci
->ir_set
->irq_control
);
390 temp
&= ~ER_IRQ_INTERVAL_MASK
;
392 xhci_writel(xhci
, temp
, &xhci
->ir_set
->irq_control
);
394 /* Set the HCD state before we enable the irqs */
395 hcd
->state
= HC_STATE_RUNNING
;
396 temp
= xhci_readl(xhci
, &xhci
->op_regs
->command
);
398 xhci_dbg(xhci
, "// Enable interrupts, cmd = 0x%x.\n",
400 xhci_writel(xhci
, temp
, &xhci
->op_regs
->command
);
402 temp
= xhci_readl(xhci
, &xhci
->ir_set
->irq_pending
);
403 xhci_dbg(xhci
, "// Enabling event ring interrupter %p by writing 0x%x to irq_pending\n",
404 xhci
->ir_set
, (unsigned int) ER_IRQ_ENABLE(temp
));
405 xhci_writel(xhci
, ER_IRQ_ENABLE(temp
),
406 &xhci
->ir_set
->irq_pending
);
407 xhci_print_ir_set(xhci
, xhci
->ir_set
, 0);
409 if (NUM_TEST_NOOPS
> 0)
410 doorbell
= xhci_setup_one_noop(xhci
);
412 xhci_dbg(xhci
, "Command ring memory map follows:\n");
413 xhci_debug_ring(xhci
, xhci
->cmd_ring
);
414 xhci_dbg_ring_ptrs(xhci
, xhci
->cmd_ring
);
415 xhci_dbg_cmd_ptrs(xhci
);
417 xhci_dbg(xhci
, "ERST memory map follows:\n");
418 xhci_dbg_erst(xhci
, &xhci
->erst
);
419 xhci_dbg(xhci
, "Event ring:\n");
420 xhci_debug_ring(xhci
, xhci
->event_ring
);
421 xhci_dbg_ring_ptrs(xhci
, xhci
->event_ring
);
422 temp_64
= xhci_read_64(xhci
, &xhci
->ir_set
->erst_dequeue
);
423 temp_64
&= ~ERST_PTR_MASK
;
424 xhci_dbg(xhci
, "ERST deq = 64'h%0lx\n", (long unsigned int) temp_64
);
426 temp
= xhci_readl(xhci
, &xhci
->op_regs
->command
);
428 xhci_dbg(xhci
, "// Turn on HC, cmd = 0x%x.\n",
430 xhci_writel(xhci
, temp
, &xhci
->op_regs
->command
);
431 /* Flush PCI posted writes */
432 temp
= xhci_readl(xhci
, &xhci
->op_regs
->command
);
433 xhci_dbg(xhci
, "// @%p = 0x%x\n", &xhci
->op_regs
->command
, temp
);
437 xhci_dbg(xhci
, "Finished xhci_run\n");
444 * This function is called by the USB core when the HC driver is removed.
445 * Its opposite is xhci_run().
447 * Disable device contexts, disable IRQs, and quiesce the HC.
448 * Reset the HC, finish any completed transactions, and cleanup memory.
450 void xhci_stop(struct usb_hcd
*hcd
)
453 struct xhci_hcd
*xhci
= hcd_to_xhci(hcd
);
455 spin_lock_irq(&xhci
->lock
);
456 if (HC_IS_RUNNING(hcd
->state
))
460 spin_unlock_irq(&xhci
->lock
);
462 #if 0 /* No MSI yet */
463 xhci_cleanup_msix(xhci
);
465 #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING
466 /* Tell the event ring poll function not to reschedule */
468 del_timer_sync(&xhci
->event_ring_timer
);
471 xhci_dbg(xhci
, "// Disabling event ring interrupts\n");
472 temp
= xhci_readl(xhci
, &xhci
->op_regs
->status
);
473 xhci_writel(xhci
, temp
& ~STS_EINT
, &xhci
->op_regs
->status
);
474 temp
= xhci_readl(xhci
, &xhci
->ir_set
->irq_pending
);
475 xhci_writel(xhci
, ER_IRQ_DISABLE(temp
),
476 &xhci
->ir_set
->irq_pending
);
477 xhci_print_ir_set(xhci
, xhci
->ir_set
, 0);
479 xhci_dbg(xhci
, "cleaning up memory\n");
480 xhci_mem_cleanup(xhci
);
481 xhci_dbg(xhci
, "xhci_stop completed - status = %x\n",
482 xhci_readl(xhci
, &xhci
->op_regs
->status
));
486 * Shutdown HC (not bus-specific)
488 * This is called when the machine is rebooting or halting. We assume that the
489 * machine will be powered off, and the HC's internal state will be reset.
490 * Don't bother to free memory.
492 void xhci_shutdown(struct usb_hcd
*hcd
)
494 struct xhci_hcd
*xhci
= hcd_to_xhci(hcd
);
496 spin_lock_irq(&xhci
->lock
);
498 spin_unlock_irq(&xhci
->lock
);
501 xhci_cleanup_msix(xhci
);
504 xhci_dbg(xhci
, "xhci_shutdown completed - status = %x\n",
505 xhci_readl(xhci
, &xhci
->op_regs
->status
));
508 /*-------------------------------------------------------------------------*/
511 * xhci_get_endpoint_index - Used for passing endpoint bitmasks between the core and
512 * HCDs. Find the index for an endpoint given its descriptor. Use the return
513 * value to right shift 1 for the bitmask.
515 * Index = (epnum * 2) + direction - 1,
516 * where direction = 0 for OUT, 1 for IN.
517 * For control endpoints, the IN index is used (OUT index is unused), so
518 * index = (epnum * 2) + direction - 1 = (epnum * 2) + 1 - 1 = (epnum * 2)
520 unsigned int xhci_get_endpoint_index(struct usb_endpoint_descriptor
*desc
)
523 if (usb_endpoint_xfer_control(desc
))
524 index
= (unsigned int) (usb_endpoint_num(desc
)*2);
526 index
= (unsigned int) (usb_endpoint_num(desc
)*2) +
527 (usb_endpoint_dir_in(desc
) ? 1 : 0) - 1;
531 /* Find the flag for this endpoint (for use in the control context). Use the
532 * endpoint index to create a bitmask. The slot context is bit 0, endpoint 0 is
535 unsigned int xhci_get_endpoint_flag(struct usb_endpoint_descriptor
*desc
)
537 return 1 << (xhci_get_endpoint_index(desc
) + 1);
540 /* Compute the last valid endpoint context index. Basically, this is the
541 * endpoint index plus one. For slot contexts with more than valid endpoint,
542 * we find the most significant bit set in the added contexts flags.
543 * e.g. ep 1 IN (with epnum 0x81) => added_ctxs = 0b1000
544 * fls(0b1000) = 4, but the endpoint context index is 3, so subtract one.
546 static inline unsigned int xhci_last_valid_endpoint(u32 added_ctxs
)
548 return fls(added_ctxs
) - 1;
551 /* Returns 1 if the arguments are OK;
552 * returns 0 this is a root hub; returns -EINVAL for NULL pointers.
554 int xhci_check_args(struct usb_hcd
*hcd
, struct usb_device
*udev
,
555 struct usb_host_endpoint
*ep
, int check_ep
, const char *func
) {
556 if (!hcd
|| (check_ep
&& !ep
) || !udev
) {
557 printk(KERN_DEBUG
"xHCI %s called with invalid args\n",
562 printk(KERN_DEBUG
"xHCI %s called for root hub\n",
566 if (!udev
->slot_id
) {
567 printk(KERN_DEBUG
"xHCI %s called with unaddressed device\n",
575 * non-error returns are a promise to giveback() the urb later
576 * we drop ownership so next owner (or urb unlink) can get it
578 int xhci_urb_enqueue(struct usb_hcd
*hcd
, struct urb
*urb
, gfp_t mem_flags
)
580 struct xhci_hcd
*xhci
= hcd_to_xhci(hcd
);
583 unsigned int slot_id
, ep_index
;
585 if (!urb
|| xhci_check_args(hcd
, urb
->dev
, urb
->ep
, true, __func__
) <= 0)
588 slot_id
= urb
->dev
->slot_id
;
589 ep_index
= xhci_get_endpoint_index(&urb
->ep
->desc
);
591 spin_lock_irqsave(&xhci
->lock
, flags
);
592 if (!xhci
->devs
|| !xhci
->devs
[slot_id
]) {
594 dev_warn(&urb
->dev
->dev
, "WARN: urb submitted for dev with no Slot ID\n");
598 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE
, &hcd
->flags
)) {
600 xhci_dbg(xhci
, "urb submitted during PCI suspend\n");
604 if (usb_endpoint_xfer_control(&urb
->ep
->desc
))
605 /* We have a spinlock and interrupts disabled, so we must pass
606 * atomic context to this function, which may allocate memory.
608 ret
= xhci_queue_ctrl_tx(xhci
, GFP_ATOMIC
, urb
,
610 else if (usb_endpoint_xfer_bulk(&urb
->ep
->desc
))
611 ret
= xhci_queue_bulk_tx(xhci
, GFP_ATOMIC
, urb
,
616 spin_unlock_irqrestore(&xhci
->lock
, flags
);
621 * Remove the URB's TD from the endpoint ring. This may cause the HC to stop
622 * USB transfers, potentially stopping in the middle of a TRB buffer. The HC
623 * should pick up where it left off in the TD, unless a Set Transfer Ring
624 * Dequeue Pointer is issued.
626 * The TRBs that make up the buffers for the canceled URB will be "removed" from
627 * the ring. Since the ring is a contiguous structure, they can't be physically
628 * removed. Instead, there are two options:
630 * 1) If the HC is in the middle of processing the URB to be canceled, we
631 * simply move the ring's dequeue pointer past those TRBs using the Set
632 * Transfer Ring Dequeue Pointer command. This will be the common case,
633 * when drivers timeout on the last submitted URB and attempt to cancel.
635 * 2) If the HC is in the middle of a different TD, we turn the TRBs into a
636 * series of 1-TRB transfer no-op TDs. (No-ops shouldn't be chained.) The
637 * HC will need to invalidate the any TRBs it has cached after the stop
638 * endpoint command, as noted in the xHCI 0.95 errata.
640 * 3) The TD may have completed by the time the Stop Endpoint Command
641 * completes, so software needs to handle that case too.
643 * This function should protect against the TD enqueueing code ringing the
644 * doorbell while this code is waiting for a Stop Endpoint command to complete.
645 * It also needs to account for multiple cancellations on happening at the same
646 * time for the same endpoint.
648 * Note that this function can be called in any context, or so says
649 * usb_hcd_unlink_urb()
651 int xhci_urb_dequeue(struct usb_hcd
*hcd
, struct urb
*urb
, int status
)
655 struct xhci_hcd
*xhci
;
657 unsigned int ep_index
;
658 struct xhci_ring
*ep_ring
;
660 xhci
= hcd_to_xhci(hcd
);
661 spin_lock_irqsave(&xhci
->lock
, flags
);
662 /* Make sure the URB hasn't completed or been unlinked already */
663 ret
= usb_hcd_check_unlink_urb(hcd
, urb
, status
);
664 if (ret
|| !urb
->hcpriv
)
667 xhci_dbg(xhci
, "Cancel URB %p\n", urb
);
668 ep_index
= xhci_get_endpoint_index(&urb
->ep
->desc
);
669 ep_ring
= xhci
->devs
[urb
->dev
->slot_id
]->ep_rings
[ep_index
];
670 td
= (struct xhci_td
*) urb
->hcpriv
;
672 ep_ring
->cancels_pending
++;
673 list_add_tail(&td
->cancelled_td_list
, &ep_ring
->cancelled_td_list
);
674 /* Queue a stop endpoint command, but only if this is
675 * the first cancellation to be handled.
677 if (ep_ring
->cancels_pending
== 1) {
678 xhci_queue_stop_endpoint(xhci
, urb
->dev
->slot_id
, ep_index
);
679 xhci_ring_cmd_db(xhci
);
682 spin_unlock_irqrestore(&xhci
->lock
, flags
);
686 /* Drop an endpoint from a new bandwidth configuration for this device.
687 * Only one call to this function is allowed per endpoint before
688 * check_bandwidth() or reset_bandwidth() must be called.
689 * A call to xhci_drop_endpoint() followed by a call to xhci_add_endpoint() will
690 * add the endpoint to the schedule with possibly new parameters denoted by a
691 * different endpoint descriptor in usb_host_endpoint.
692 * A call to xhci_add_endpoint() followed by a call to xhci_drop_endpoint() is
695 * The USB core will not allow URBs to be queued to an endpoint that is being
696 * disabled, so there's no need for mutual exclusion to protect
697 * the xhci->devs[slot_id] structure.
699 int xhci_drop_endpoint(struct usb_hcd
*hcd
, struct usb_device
*udev
,
700 struct usb_host_endpoint
*ep
)
702 struct xhci_hcd
*xhci
;
703 struct xhci_device_control
*in_ctx
;
704 unsigned int last_ctx
;
705 unsigned int ep_index
;
706 struct xhci_ep_ctx
*ep_ctx
;
708 u32 new_add_flags
, new_drop_flags
, new_slot_info
;
711 ret
= xhci_check_args(hcd
, udev
, ep
, 1, __func__
);
714 xhci
= hcd_to_xhci(hcd
);
715 xhci_dbg(xhci
, "%s called for udev %p\n", __func__
, udev
);
717 drop_flag
= xhci_get_endpoint_flag(&ep
->desc
);
718 if (drop_flag
== SLOT_FLAG
|| drop_flag
== EP0_FLAG
) {
719 xhci_dbg(xhci
, "xHCI %s - can't drop slot or ep 0 %#x\n",
720 __func__
, drop_flag
);
724 if (!xhci
->devs
|| !xhci
->devs
[udev
->slot_id
]) {
725 xhci_warn(xhci
, "xHCI %s called with unaddressed device\n",
730 in_ctx
= xhci
->devs
[udev
->slot_id
]->in_ctx
;
731 ep_index
= xhci_get_endpoint_index(&ep
->desc
);
732 ep_ctx
= &xhci
->devs
[udev
->slot_id
]->out_ctx
->ep
[ep_index
];
733 /* If the HC already knows the endpoint is disabled,
734 * or the HCD has noted it is disabled, ignore this request
736 if ((ep_ctx
->ep_info
& EP_STATE_MASK
) == EP_STATE_DISABLED
||
737 in_ctx
->drop_flags
& xhci_get_endpoint_flag(&ep
->desc
)) {
738 xhci_warn(xhci
, "xHCI %s called with disabled ep %p\n",
743 in_ctx
->drop_flags
|= drop_flag
;
744 new_drop_flags
= in_ctx
->drop_flags
;
746 in_ctx
->add_flags
= ~drop_flag
;
747 new_add_flags
= in_ctx
->add_flags
;
749 last_ctx
= xhci_last_valid_endpoint(in_ctx
->add_flags
);
750 /* Update the last valid endpoint context, if we deleted the last one */
751 if ((in_ctx
->slot
.dev_info
& LAST_CTX_MASK
) > LAST_CTX(last_ctx
)) {
752 in_ctx
->slot
.dev_info
&= ~LAST_CTX_MASK
;
753 in_ctx
->slot
.dev_info
|= LAST_CTX(last_ctx
);
755 new_slot_info
= in_ctx
->slot
.dev_info
;
757 xhci_endpoint_zero(xhci
, xhci
->devs
[udev
->slot_id
], ep
);
759 xhci_dbg(xhci
, "drop ep 0x%x, slot id %d, new drop flags = %#x, new add flags = %#x, new slot info = %#x\n",
760 (unsigned int) ep
->desc
.bEndpointAddress
,
762 (unsigned int) new_drop_flags
,
763 (unsigned int) new_add_flags
,
764 (unsigned int) new_slot_info
);
768 /* Add an endpoint to a new possible bandwidth configuration for this device.
769 * Only one call to this function is allowed per endpoint before
770 * check_bandwidth() or reset_bandwidth() must be called.
771 * A call to xhci_drop_endpoint() followed by a call to xhci_add_endpoint() will
772 * add the endpoint to the schedule with possibly new parameters denoted by a
773 * different endpoint descriptor in usb_host_endpoint.
774 * A call to xhci_add_endpoint() followed by a call to xhci_drop_endpoint() is
777 * The USB core will not allow URBs to be queued to an endpoint until the
778 * configuration or alt setting is installed in the device, so there's no need
779 * for mutual exclusion to protect the xhci->devs[slot_id] structure.
781 int xhci_add_endpoint(struct usb_hcd
*hcd
, struct usb_device
*udev
,
782 struct usb_host_endpoint
*ep
)
784 struct xhci_hcd
*xhci
;
785 struct xhci_device_control
*in_ctx
;
786 unsigned int ep_index
;
787 struct xhci_ep_ctx
*ep_ctx
;
789 unsigned int last_ctx
;
790 u32 new_add_flags
, new_drop_flags
, new_slot_info
;
793 ret
= xhci_check_args(hcd
, udev
, ep
, 1, __func__
);
795 /* So we won't queue a reset ep command for a root hub */
799 xhci
= hcd_to_xhci(hcd
);
801 added_ctxs
= xhci_get_endpoint_flag(&ep
->desc
);
802 last_ctx
= xhci_last_valid_endpoint(added_ctxs
);
803 if (added_ctxs
== SLOT_FLAG
|| added_ctxs
== EP0_FLAG
) {
804 /* FIXME when we have to issue an evaluate endpoint command to
805 * deal with ep0 max packet size changing once we get the
808 xhci_dbg(xhci
, "xHCI %s - can't add slot or ep 0 %#x\n",
809 __func__
, added_ctxs
);
813 if (!xhci
->devs
|| !xhci
->devs
[udev
->slot_id
]) {
814 xhci_warn(xhci
, "xHCI %s called with unaddressed device\n",
819 in_ctx
= xhci
->devs
[udev
->slot_id
]->in_ctx
;
820 ep_index
= xhci_get_endpoint_index(&ep
->desc
);
821 ep_ctx
= &xhci
->devs
[udev
->slot_id
]->out_ctx
->ep
[ep_index
];
822 /* If the HCD has already noted the endpoint is enabled,
823 * ignore this request.
825 if (in_ctx
->add_flags
& xhci_get_endpoint_flag(&ep
->desc
)) {
826 xhci_warn(xhci
, "xHCI %s called with enabled ep %p\n",
832 * Configuration and alternate setting changes must be done in
833 * process context, not interrupt context (or so documenation
834 * for usb_set_interface() and usb_set_configuration() claim).
836 if (xhci_endpoint_init(xhci
, xhci
->devs
[udev
->slot_id
],
837 udev
, ep
, GFP_KERNEL
) < 0) {
838 dev_dbg(&udev
->dev
, "%s - could not initialize ep %#x\n",
839 __func__
, ep
->desc
.bEndpointAddress
);
843 in_ctx
->add_flags
|= added_ctxs
;
844 new_add_flags
= in_ctx
->add_flags
;
846 /* If xhci_endpoint_disable() was called for this endpoint, but the
847 * xHC hasn't been notified yet through the check_bandwidth() call,
848 * this re-adds a new state for the endpoint from the new endpoint
849 * descriptors. We must drop and re-add this endpoint, so we leave the
852 new_drop_flags
= in_ctx
->drop_flags
;
854 /* Update the last valid endpoint context, if we just added one past */
855 if ((in_ctx
->slot
.dev_info
& LAST_CTX_MASK
) < LAST_CTX(last_ctx
)) {
856 in_ctx
->slot
.dev_info
&= ~LAST_CTX_MASK
;
857 in_ctx
->slot
.dev_info
|= LAST_CTX(last_ctx
);
859 new_slot_info
= in_ctx
->slot
.dev_info
;
861 /* Store the usb_device pointer for later use */
864 xhci_dbg(xhci
, "add ep 0x%x, slot id %d, new drop flags = %#x, new add flags = %#x, new slot info = %#x\n",
865 (unsigned int) ep
->desc
.bEndpointAddress
,
867 (unsigned int) new_drop_flags
,
868 (unsigned int) new_add_flags
,
869 (unsigned int) new_slot_info
);
873 static void xhci_zero_in_ctx(struct xhci_virt_device
*virt_dev
)
875 struct xhci_ep_ctx
*ep_ctx
;
878 /* When a device's add flag and drop flag are zero, any subsequent
879 * configure endpoint command will leave that endpoint's state
880 * untouched. Make sure we don't leave any old state in the input
883 virt_dev
->in_ctx
->drop_flags
= 0;
884 virt_dev
->in_ctx
->add_flags
= 0;
885 virt_dev
->in_ctx
->slot
.dev_info
&= ~LAST_CTX_MASK
;
886 /* Endpoint 0 is always valid */
887 virt_dev
->in_ctx
->slot
.dev_info
|= LAST_CTX(1);
888 for (i
= 1; i
< 31; ++i
) {
889 ep_ctx
= &virt_dev
->in_ctx
->ep
[i
];
891 ep_ctx
->ep_info2
= 0;
897 /* Called after one or more calls to xhci_add_endpoint() or
898 * xhci_drop_endpoint(). If this call fails, the USB core is expected
899 * to call xhci_reset_bandwidth().
901 * Since we are in the middle of changing either configuration or
902 * installing a new alt setting, the USB core won't allow URBs to be
903 * enqueued for any endpoint on the old config or interface. Nothing
904 * else should be touching the xhci->devs[slot_id] structure, so we
905 * don't need to take the xhci->lock for manipulating that.
907 int xhci_check_bandwidth(struct usb_hcd
*hcd
, struct usb_device
*udev
)
913 struct xhci_hcd
*xhci
;
914 struct xhci_virt_device
*virt_dev
;
916 ret
= xhci_check_args(hcd
, udev
, NULL
, 0, __func__
);
919 xhci
= hcd_to_xhci(hcd
);
921 if (!udev
->slot_id
|| !xhci
->devs
|| !xhci
->devs
[udev
->slot_id
]) {
922 xhci_warn(xhci
, "xHCI %s called with unaddressed device\n",
926 xhci_dbg(xhci
, "%s called for udev %p\n", __func__
, udev
);
927 virt_dev
= xhci
->devs
[udev
->slot_id
];
929 /* See section 4.6.6 - A0 = 1; A1 = D0 = D1 = 0 */
930 virt_dev
->in_ctx
->add_flags
|= SLOT_FLAG
;
931 virt_dev
->in_ctx
->add_flags
&= ~EP0_FLAG
;
932 virt_dev
->in_ctx
->drop_flags
&= ~SLOT_FLAG
;
933 virt_dev
->in_ctx
->drop_flags
&= ~EP0_FLAG
;
934 xhci_dbg(xhci
, "New Input Control Context:\n");
935 xhci_dbg_ctx(xhci
, virt_dev
->in_ctx
, virt_dev
->in_ctx_dma
,
936 LAST_CTX_TO_EP_NUM(virt_dev
->in_ctx
->slot
.dev_info
));
938 spin_lock_irqsave(&xhci
->lock
, flags
);
939 ret
= xhci_queue_configure_endpoint(xhci
, virt_dev
->in_ctx_dma
,
942 spin_unlock_irqrestore(&xhci
->lock
, flags
);
943 xhci_dbg(xhci
, "FIXME allocate a new ring segment\n");
946 xhci_ring_cmd_db(xhci
);
947 spin_unlock_irqrestore(&xhci
->lock
, flags
);
949 /* Wait for the configure endpoint command to complete */
950 timeleft
= wait_for_completion_interruptible_timeout(
951 &virt_dev
->cmd_completion
,
952 USB_CTRL_SET_TIMEOUT
);
954 xhci_warn(xhci
, "%s while waiting for configure endpoint command\n",
955 timeleft
== 0 ? "Timeout" : "Signal");
956 /* FIXME cancel the configure endpoint command */
960 switch (virt_dev
->cmd_status
) {
962 dev_warn(&udev
->dev
, "Not enough host controller resources "
963 "for new device state.\n");
965 /* FIXME: can we allocate more resources for the HC? */
968 dev_warn(&udev
->dev
, "Not enough bandwidth "
969 "for new device state.\n");
971 /* FIXME: can we go back to the old state? */
974 /* the HCD set up something wrong */
975 dev_warn(&udev
->dev
, "ERROR: Endpoint drop flag = 0, add flag = 1, "
976 "and endpoint is not disabled.\n");
980 dev_dbg(&udev
->dev
, "Successful Endpoint Configure command\n");
983 xhci_err(xhci
, "ERROR: unexpected command completion "
984 "code 0x%x.\n", virt_dev
->cmd_status
);
989 /* Callee should call reset_bandwidth() */
993 xhci_dbg(xhci
, "Output context after successful config ep cmd:\n");
994 xhci_dbg_ctx(xhci
, virt_dev
->out_ctx
, virt_dev
->out_ctx_dma
,
995 LAST_CTX_TO_EP_NUM(virt_dev
->in_ctx
->slot
.dev_info
));
997 xhci_zero_in_ctx(virt_dev
);
998 /* Free any old rings */
999 for (i
= 1; i
< 31; ++i
) {
1000 if (virt_dev
->new_ep_rings
[i
]) {
1001 xhci_ring_free(xhci
, virt_dev
->ep_rings
[i
]);
1002 virt_dev
->ep_rings
[i
] = virt_dev
->new_ep_rings
[i
];
1003 virt_dev
->new_ep_rings
[i
] = NULL
;
1010 void xhci_reset_bandwidth(struct usb_hcd
*hcd
, struct usb_device
*udev
)
1012 struct xhci_hcd
*xhci
;
1013 struct xhci_virt_device
*virt_dev
;
1016 ret
= xhci_check_args(hcd
, udev
, NULL
, 0, __func__
);
1019 xhci
= hcd_to_xhci(hcd
);
1021 if (!xhci
->devs
|| !xhci
->devs
[udev
->slot_id
]) {
1022 xhci_warn(xhci
, "xHCI %s called with unaddressed device\n",
1026 xhci_dbg(xhci
, "%s called for udev %p\n", __func__
, udev
);
1027 virt_dev
= xhci
->devs
[udev
->slot_id
];
1028 /* Free any rings allocated for added endpoints */
1029 for (i
= 0; i
< 31; ++i
) {
1030 if (virt_dev
->new_ep_rings
[i
]) {
1031 xhci_ring_free(xhci
, virt_dev
->new_ep_rings
[i
]);
1032 virt_dev
->new_ep_rings
[i
] = NULL
;
1035 xhci_zero_in_ctx(virt_dev
);
1038 /* Deal with stalled endpoints. The core should have sent the control message
1039 * to clear the halt condition. However, we need to make the xHCI hardware
1040 * reset its sequence number, since a device will expect a sequence number of
1041 * zero after the halt condition is cleared.
1042 * Context: in_interrupt
1044 void xhci_endpoint_reset(struct usb_hcd
*hcd
,
1045 struct usb_host_endpoint
*ep
)
1047 struct xhci_hcd
*xhci
;
1048 struct usb_device
*udev
;
1049 unsigned int ep_index
;
1050 unsigned long flags
;
1053 xhci
= hcd_to_xhci(hcd
);
1054 udev
= (struct usb_device
*) ep
->hcpriv
;
1055 /* Called with a root hub endpoint (or an endpoint that wasn't added
1056 * with xhci_add_endpoint()
1060 ep_index
= xhci_get_endpoint_index(&ep
->desc
);
1062 xhci_dbg(xhci
, "Queueing reset endpoint command\n");
1063 spin_lock_irqsave(&xhci
->lock
, flags
);
1064 ret
= xhci_queue_reset_ep(xhci
, udev
->slot_id
, ep_index
);
1066 xhci_ring_cmd_db(xhci
);
1068 spin_unlock_irqrestore(&xhci
->lock
, flags
);
1071 xhci_warn(xhci
, "FIXME allocate a new ring segment\n");
1075 * At this point, the struct usb_device is about to go away, the device has
1076 * disconnected, and all traffic has been stopped and the endpoints have been
1077 * disabled. Free any HC data structures associated with that device.
1079 void xhci_free_dev(struct usb_hcd
*hcd
, struct usb_device
*udev
)
1081 struct xhci_hcd
*xhci
= hcd_to_xhci(hcd
);
1082 unsigned long flags
;
1084 if (udev
->slot_id
== 0)
1087 spin_lock_irqsave(&xhci
->lock
, flags
);
1088 if (xhci_queue_slot_control(xhci
, TRB_DISABLE_SLOT
, udev
->slot_id
)) {
1089 spin_unlock_irqrestore(&xhci
->lock
, flags
);
1090 xhci_dbg(xhci
, "FIXME: allocate a command ring segment\n");
1093 xhci_ring_cmd_db(xhci
);
1094 spin_unlock_irqrestore(&xhci
->lock
, flags
);
1096 * Event command completion handler will free any data structures
1097 * associated with the slot. XXX Can free sleep?
1102 * Returns 0 if the xHC ran out of device slots, the Enable Slot command
1103 * timed out, or allocating memory failed. Returns 1 on success.
1105 int xhci_alloc_dev(struct usb_hcd
*hcd
, struct usb_device
*udev
)
1107 struct xhci_hcd
*xhci
= hcd_to_xhci(hcd
);
1108 unsigned long flags
;
1112 spin_lock_irqsave(&xhci
->lock
, flags
);
1113 ret
= xhci_queue_slot_control(xhci
, TRB_ENABLE_SLOT
, 0);
1115 spin_unlock_irqrestore(&xhci
->lock
, flags
);
1116 xhci_dbg(xhci
, "FIXME: allocate a command ring segment\n");
1119 xhci_ring_cmd_db(xhci
);
1120 spin_unlock_irqrestore(&xhci
->lock
, flags
);
1122 /* XXX: how much time for xHC slot assignment? */
1123 timeleft
= wait_for_completion_interruptible_timeout(&xhci
->addr_dev
,
1124 USB_CTRL_SET_TIMEOUT
);
1125 if (timeleft
<= 0) {
1126 xhci_warn(xhci
, "%s while waiting for a slot\n",
1127 timeleft
== 0 ? "Timeout" : "Signal");
1128 /* FIXME cancel the enable slot request */
1132 if (!xhci
->slot_id
) {
1133 xhci_err(xhci
, "Error while assigning device slot ID\n");
1136 /* xhci_alloc_virt_device() does not touch rings; no need to lock */
1137 if (!xhci_alloc_virt_device(xhci
, xhci
->slot_id
, udev
, GFP_KERNEL
)) {
1138 /* Disable slot, if we can do it without mem alloc */
1139 xhci_warn(xhci
, "Could not allocate xHCI USB device data structures\n");
1140 spin_lock_irqsave(&xhci
->lock
, flags
);
1141 if (!xhci_queue_slot_control(xhci
, TRB_DISABLE_SLOT
, udev
->slot_id
))
1142 xhci_ring_cmd_db(xhci
);
1143 spin_unlock_irqrestore(&xhci
->lock
, flags
);
1146 udev
->slot_id
= xhci
->slot_id
;
1147 /* Is this a LS or FS device under a HS hub? */
1148 /* Hub or peripherial? */
1153 * Issue an Address Device command (which will issue a SetAddress request to
1155 * We should be protected by the usb_address0_mutex in khubd's hub_port_init, so
1156 * we should only issue and wait on one address command at the same time.
1158 * We add one to the device address issued by the hardware because the USB core
1159 * uses address 1 for the root hubs (even though they're not really devices).
1161 int xhci_address_device(struct usb_hcd
*hcd
, struct usb_device
*udev
)
1163 unsigned long flags
;
1165 struct xhci_virt_device
*virt_dev
;
1167 struct xhci_hcd
*xhci
= hcd_to_xhci(hcd
);
1170 if (!udev
->slot_id
) {
1171 xhci_dbg(xhci
, "Bad Slot ID %d\n", udev
->slot_id
);
1175 virt_dev
= xhci
->devs
[udev
->slot_id
];
1177 /* If this is a Set Address to an unconfigured device, setup ep 0 */
1179 xhci_setup_addressable_virt_dev(xhci
, udev
);
1180 /* Otherwise, assume the core has the device configured how it wants */
1182 spin_lock_irqsave(&xhci
->lock
, flags
);
1183 ret
= xhci_queue_address_device(xhci
, virt_dev
->in_ctx_dma
,
1186 spin_unlock_irqrestore(&xhci
->lock
, flags
);
1187 xhci_dbg(xhci
, "FIXME: allocate a command ring segment\n");
1190 xhci_ring_cmd_db(xhci
);
1191 spin_unlock_irqrestore(&xhci
->lock
, flags
);
1193 /* ctrl tx can take up to 5 sec; XXX: need more time for xHC? */
1194 timeleft
= wait_for_completion_interruptible_timeout(&xhci
->addr_dev
,
1195 USB_CTRL_SET_TIMEOUT
);
1196 /* FIXME: From section 4.3.4: "Software shall be responsible for timing
1197 * the SetAddress() "recovery interval" required by USB and aborting the
1198 * command on a timeout.
1200 if (timeleft
<= 0) {
1201 xhci_warn(xhci
, "%s while waiting for a slot\n",
1202 timeleft
== 0 ? "Timeout" : "Signal");
1203 /* FIXME cancel the address device command */
1207 switch (virt_dev
->cmd_status
) {
1208 case COMP_CTX_STATE
:
1210 xhci_err(xhci
, "Setup ERROR: address device command for slot %d.\n",
1215 dev_warn(&udev
->dev
, "Device not responding to set address.\n");
1219 xhci_dbg(xhci
, "Successful Address Device command\n");
1222 xhci_err(xhci
, "ERROR: unexpected command completion "
1223 "code 0x%x.\n", virt_dev
->cmd_status
);
1230 temp_64
= xhci_read_64(xhci
, &xhci
->op_regs
->dcbaa_ptr
);
1231 xhci_dbg(xhci
, "Op regs DCBAA ptr = %#016llx\n", temp_64
);
1232 xhci_dbg(xhci
, "Slot ID %d dcbaa entry @%p = %#016llx\n",
1234 &xhci
->dcbaa
->dev_context_ptrs
[udev
->slot_id
],
1235 (unsigned long long)
1236 xhci
->dcbaa
->dev_context_ptrs
[udev
->slot_id
]);
1237 xhci_dbg(xhci
, "Output Context DMA address = %#08llx\n",
1238 (unsigned long long)virt_dev
->out_ctx_dma
);
1239 xhci_dbg(xhci
, "Slot ID %d Input Context:\n", udev
->slot_id
);
1240 xhci_dbg_ctx(xhci
, virt_dev
->in_ctx
, virt_dev
->in_ctx_dma
, 2);
1241 xhci_dbg(xhci
, "Slot ID %d Output Context:\n", udev
->slot_id
);
1242 xhci_dbg_ctx(xhci
, virt_dev
->out_ctx
, virt_dev
->out_ctx_dma
, 2);
1244 * USB core uses address 1 for the roothubs, so we add one to the
1245 * address given back to us by the HC.
1247 udev
->devnum
= (virt_dev
->out_ctx
->slot
.dev_state
& DEV_ADDR_MASK
) + 1;
1248 /* Zero the input context control for later use */
1249 virt_dev
->in_ctx
->add_flags
= 0;
1250 virt_dev
->in_ctx
->drop_flags
= 0;
1251 /* Mirror flags in the output context for future ep enable/disable */
1252 virt_dev
->out_ctx
->add_flags
= SLOT_FLAG
| EP0_FLAG
;
1253 virt_dev
->out_ctx
->drop_flags
= 0;
1255 xhci_dbg(xhci
, "Device address = %d\n", udev
->devnum
);
1256 /* XXX Meh, not sure if anyone else but choose_address uses this. */
1257 set_bit(udev
->devnum
, udev
->bus
->devmap
.devicemap
);
1262 int xhci_get_frame(struct usb_hcd
*hcd
)
1264 struct xhci_hcd
*xhci
= hcd_to_xhci(hcd
);
1265 /* EHCI mods by the periodic size. Why? */
1266 return xhci_readl(xhci
, &xhci
->run_regs
->microframe_index
) >> 3;
1269 MODULE_DESCRIPTION(DRIVER_DESC
);
1270 MODULE_AUTHOR(DRIVER_AUTHOR
);
1271 MODULE_LICENSE("GPL");
1273 static int __init
xhci_hcd_init(void)
1278 retval
= xhci_register_pci();
1281 printk(KERN_DEBUG
"Problem registering PCI driver.");
1286 * Check the compiler generated sizes of structures that must be laid
1287 * out in specific ways for hardware access.
1289 BUILD_BUG_ON(sizeof(struct xhci_doorbell_array
) != 256*32/8);
1290 BUILD_BUG_ON(sizeof(struct xhci_slot_ctx
) != 8*32/8);
1291 BUILD_BUG_ON(sizeof(struct xhci_ep_ctx
) != 8*32/8);
1292 /* xhci_device_control has eight fields, and also
1293 * embeds one xhci_slot_ctx and 31 xhci_ep_ctx
1295 BUILD_BUG_ON(sizeof(struct xhci_device_control
) != (8+8+8*31)*32/8);
1296 BUILD_BUG_ON(sizeof(struct xhci_stream_ctx
) != 4*32/8);
1297 BUILD_BUG_ON(sizeof(union xhci_trb
) != 4*32/8);
1298 BUILD_BUG_ON(sizeof(struct xhci_erst_entry
) != 4*32/8);
1299 BUILD_BUG_ON(sizeof(struct xhci_cap_regs
) != 7*32/8);
1300 BUILD_BUG_ON(sizeof(struct xhci_intr_reg
) != 8*32/8);
1301 /* xhci_run_regs has eight fields and embeds 128 xhci_intr_regs */
1302 BUILD_BUG_ON(sizeof(struct xhci_run_regs
) != (8+8*128)*32/8);
1303 BUILD_BUG_ON(sizeof(struct xhci_doorbell_array
) != 256*32/8);
1306 module_init(xhci_hcd_init
);
1308 static void __exit
xhci_hcd_cleanup(void)
1311 xhci_unregister_pci();
1314 module_exit(xhci_hcd_cleanup
);