104 static void xhci_dbc_init_contexts(struct xhci_dbc *dbc, u32 string_length)  in xhci_dbc_init_contexts()  argument
112 	if (!dbc)  in xhci_dbc_init_contexts()
116 	info			= (struct dbc_info_context *)dbc->ctx->bytes;  in xhci_dbc_init_contexts()
117 	dma			= dbc->string_dma;  in xhci_dbc_init_contexts()
125 	ep_ctx			= dbc_bulkout_ctx(dbc);  in xhci_dbc_init_contexts()
126 	max_burst		= DBC_CTRL_MAXBURST(readl(&dbc->regs->control));  in xhci_dbc_init_contexts()
127 	deq			= dbc_bulkout_enq(dbc);  in xhci_dbc_init_contexts()
130 	ep_ctx->deq		= cpu_to_le64(deq | dbc->ring_out->cycle_state);  in xhci_dbc_init_contexts()
133 	ep_ctx			= dbc_bulkin_ctx(dbc);  in xhci_dbc_init_contexts()
134 	deq			= dbc_bulkin_enq(dbc);  in xhci_dbc_init_contexts()
137 	ep_ctx->deq		= cpu_to_le64(deq | dbc->ring_in->cycle_state);  in xhci_dbc_init_contexts()
140 	lo_hi_writeq(dbc->ctx->dma, &dbc->regs->dccp);  in xhci_dbc_init_contexts()
142 	dev_info = (dbc->idVendor << 16) | dbc->bInterfaceProtocol;  in xhci_dbc_init_contexts()
143 	writel(dev_info, &dbc->regs->devinfo1);  in xhci_dbc_init_contexts()
145 	dev_info = (dbc->bcdDevice << 16) | dbc->idProduct;  in xhci_dbc_init_contexts()
146 	writel(dev_info, &dbc->regs->devinfo2);  in xhci_dbc_init_contexts()
150 	__releases(&dbc->lock)  in xhci_dbc_giveback()
151 	__acquires(&dbc->lock)  in xhci_dbc_giveback()
153 	struct xhci_dbc		*dbc = req->dbc;  in xhci_dbc_giveback()  local
154 	struct device		*dev = dbc->dev;  in xhci_dbc_giveback()
171 	spin_unlock(&dbc->lock);  in xhci_dbc_giveback()
172 	req->complete(dbc, req);  in xhci_dbc_giveback()
173 	spin_lock(&dbc->lock);  in xhci_dbc_giveback()
199 static void xhci_dbc_flush_requests(struct xhci_dbc *dbc)  in xhci_dbc_flush_requests()  argument
201 	xhci_dbc_flush_endpoint_requests(&dbc->eps[BULK_OUT]);  in xhci_dbc_flush_requests()
202 	xhci_dbc_flush_endpoint_requests(&dbc->eps[BULK_IN]);  in xhci_dbc_flush_requests()
206 dbc_alloc_request(struct xhci_dbc *dbc, unsigned int direction, gfp_t flags)  in dbc_alloc_request()  argument
214 	if (!dbc)  in dbc_alloc_request()
221 	req->dbc = dbc;  in dbc_alloc_request()
268 	struct xhci_dbc		*dbc = req->dbc;  in xhci_dbc_queue_bulk_tx()  local
306 	writel(DBC_DOOR_BELL_TARGET(dep->direction), &dbc->regs->doorbell);  in xhci_dbc_queue_bulk_tx()
315 	struct xhci_dbc		*dbc = req->dbc;  in dbc_ep_do_queue()  local
316 	struct device		*dev = dbc->dev;  in dbc_ep_do_queue()
317 	struct dbc_ep		*dep = &dbc->eps[req->direction];  in dbc_ep_do_queue()
330 		dev_err(dbc->dev, "failed to map buffer\n");  in dbc_ep_do_queue()
336 		dev_err(dbc->dev, "failed to queue trbs\n");  in dbc_ep_do_queue()
352 	struct xhci_dbc		*dbc = req->dbc;  in dbc_ep_queue()  local
355 	if (!dbc)  in dbc_ep_queue()
362 	spin_lock_irqsave(&dbc->lock, flags);  in dbc_ep_queue()
363 	if (dbc->state == DS_CONFIGURED)  in dbc_ep_queue()
365 	spin_unlock_irqrestore(&dbc->lock, flags);  in dbc_ep_queue()
367 	mod_delayed_work(system_wq, &dbc->event_work, 0);  in dbc_ep_queue()
374 static inline void xhci_dbc_do_eps_init(struct xhci_dbc *dbc, bool direction)  in xhci_dbc_do_eps_init()  argument
378 	dep			= &dbc->eps[direction];  in xhci_dbc_do_eps_init()
379 	dep->dbc		= dbc;  in xhci_dbc_do_eps_init()
381 	dep->ring		= direction ? dbc->ring_in : dbc->ring_out;  in xhci_dbc_do_eps_init()
386 static void xhci_dbc_eps_init(struct xhci_dbc *dbc)  in xhci_dbc_eps_init()  argument
388 	xhci_dbc_do_eps_init(dbc, BULK_OUT);  in xhci_dbc_eps_init()
389 	xhci_dbc_do_eps_init(dbc, BULK_IN);  in xhci_dbc_eps_init()
392 static void xhci_dbc_eps_exit(struct xhci_dbc *dbc)  in xhci_dbc_eps_exit()  argument
394 	memset(dbc->eps, 0, sizeof_field(struct xhci_dbc, eps));  in xhci_dbc_eps_exit()
483 static int xhci_dbc_mem_init(struct xhci_dbc *dbc, gfp_t flags)  in xhci_dbc_mem_init()  argument
488 	struct device		*dev = dbc->dev;  in xhci_dbc_mem_init()
491 	dbc->ring_evt = xhci_dbc_ring_alloc(dev, TYPE_EVENT, flags);  in xhci_dbc_mem_init()
492 	if (!dbc->ring_evt)  in xhci_dbc_mem_init()
495 	dbc->ring_in = xhci_dbc_ring_alloc(dev, TYPE_BULK, flags);  in xhci_dbc_mem_init()
496 	if (!dbc->ring_in)  in xhci_dbc_mem_init()
499 	dbc->ring_out = xhci_dbc_ring_alloc(dev, TYPE_BULK, flags);  in xhci_dbc_mem_init()
500 	if (!dbc->ring_out)  in xhci_dbc_mem_init()
504 	ret = dbc_erst_alloc(dev, dbc->ring_evt, &dbc->erst, flags);  in xhci_dbc_mem_init()
509 	dbc->ctx = dbc_alloc_ctx(dev, flags); /* was sysdev, and is still */  in xhci_dbc_mem_init()
510 	if (!dbc->ctx)  in xhci_dbc_mem_init()
514 	dbc->string_size = sizeof(*dbc->string);  in xhci_dbc_mem_init()
515 	dbc->string = dma_alloc_coherent(dev, dbc->string_size,  in xhci_dbc_mem_init()
516 					 &dbc->string_dma, flags);  in xhci_dbc_mem_init()
517 	if (!dbc->string)  in xhci_dbc_mem_init()
521 	writel(dbc->erst.num_entries, &dbc->regs->ersts);  in xhci_dbc_mem_init()
523 	lo_hi_writeq(dbc->erst.erst_dma_addr, &dbc->regs->erstba);  in xhci_dbc_mem_init()
524 	deq = xhci_trb_virt_to_dma(dbc->ring_evt->deq_seg,  in xhci_dbc_mem_init()
525 				   dbc->ring_evt->dequeue);  in xhci_dbc_mem_init()
526 	lo_hi_writeq(deq, &dbc->regs->erdp);  in xhci_dbc_mem_init()
529 	string_length = xhci_dbc_populate_strings(dbc->string);  in xhci_dbc_mem_init()
530 	xhci_dbc_init_contexts(dbc, string_length);  in xhci_dbc_mem_init()
532 	xhci_dbc_eps_init(dbc);  in xhci_dbc_mem_init()
533 	dbc->state = DS_INITIALIZED;  in xhci_dbc_mem_init()
538 	dbc_free_ctx(dev, dbc->ctx);  in xhci_dbc_mem_init()
539 	dbc->ctx = NULL;  in xhci_dbc_mem_init()
541 	dbc_erst_free(dev, &dbc->erst);  in xhci_dbc_mem_init()
543 	dbc_ring_free(dev, dbc->ring_out);  in xhci_dbc_mem_init()
544 	dbc->ring_out = NULL;  in xhci_dbc_mem_init()
546 	dbc_ring_free(dev, dbc->ring_in);  in xhci_dbc_mem_init()
547 	dbc->ring_in = NULL;  in xhci_dbc_mem_init()
549 	dbc_ring_free(dev, dbc->ring_evt);  in xhci_dbc_mem_init()
550 	dbc->ring_evt = NULL;  in xhci_dbc_mem_init()
555 static void xhci_dbc_mem_cleanup(struct xhci_dbc *dbc)  in xhci_dbc_mem_cleanup()  argument
557 	if (!dbc)  in xhci_dbc_mem_cleanup()
560 	xhci_dbc_eps_exit(dbc);  in xhci_dbc_mem_cleanup()
562 	dma_free_coherent(dbc->dev, dbc->string_size, dbc->string, dbc->string_dma);  in xhci_dbc_mem_cleanup()
563 	dbc->string = NULL;  in xhci_dbc_mem_cleanup()
565 	dbc_free_ctx(dbc->dev, dbc->ctx);  in xhci_dbc_mem_cleanup()
566 	dbc->ctx = NULL;  in xhci_dbc_mem_cleanup()
568 	dbc_erst_free(dbc->dev, &dbc->erst);  in xhci_dbc_mem_cleanup()
569 	dbc_ring_free(dbc->dev, dbc->ring_out);  in xhci_dbc_mem_cleanup()
570 	dbc_ring_free(dbc->dev, dbc->ring_in);  in xhci_dbc_mem_cleanup()
571 	dbc_ring_free(dbc->dev, dbc->ring_evt);  in xhci_dbc_mem_cleanup()
572 	dbc->ring_in = NULL;  in xhci_dbc_mem_cleanup()
573 	dbc->ring_out = NULL;  in xhci_dbc_mem_cleanup()
574 	dbc->ring_evt = NULL;  in xhci_dbc_mem_cleanup()
577 static int xhci_do_dbc_start(struct xhci_dbc *dbc)  in xhci_do_dbc_start()  argument
582 	if (dbc->state != DS_DISABLED)  in xhci_do_dbc_start()
585 	writel(0, &dbc->regs->control);  in xhci_do_dbc_start()
586 	ret = xhci_handshake(&dbc->regs->control,  in xhci_do_dbc_start()
592 	ret = xhci_dbc_mem_init(dbc, GFP_ATOMIC);  in xhci_do_dbc_start()
596 	ctrl = readl(&dbc->regs->control);  in xhci_do_dbc_start()
598 	       &dbc->regs->control);  in xhci_do_dbc_start()
599 	ret = xhci_handshake(&dbc->regs->control,  in xhci_do_dbc_start()
605 	dbc->state = DS_ENABLED;  in xhci_do_dbc_start()
610 static int xhci_do_dbc_stop(struct xhci_dbc *dbc)  in xhci_do_dbc_stop()  argument
612 	if (dbc->state == DS_DISABLED)  in xhci_do_dbc_stop()
615 	writel(0, &dbc->regs->control);  in xhci_do_dbc_stop()
616 	dbc->state = DS_DISABLED;  in xhci_do_dbc_stop()
621 static int xhci_dbc_start(struct xhci_dbc *dbc)  in xhci_dbc_start()  argument
626 	WARN_ON(!dbc);  in xhci_dbc_start()
628 	pm_runtime_get_sync(dbc->dev); /* note this was self.controller */  in xhci_dbc_start()
630 	spin_lock_irqsave(&dbc->lock, flags);  in xhci_dbc_start()
631 	ret = xhci_do_dbc_start(dbc);  in xhci_dbc_start()
632 	spin_unlock_irqrestore(&dbc->lock, flags);  in xhci_dbc_start()
635 		pm_runtime_put(dbc->dev); /* note this was self.controller */  in xhci_dbc_start()
639 	return mod_delayed_work(system_wq, &dbc->event_work,  in xhci_dbc_start()
640 				msecs_to_jiffies(dbc->poll_interval));  in xhci_dbc_start()
643 static void xhci_dbc_stop(struct xhci_dbc *dbc)  in xhci_dbc_stop()  argument
648 	WARN_ON(!dbc);  in xhci_dbc_stop()
650 	switch (dbc->state) {  in xhci_dbc_stop()
654 		if (dbc->driver->disconnect)  in xhci_dbc_stop()
655 			dbc->driver->disconnect(dbc);  in xhci_dbc_stop()
661 	cancel_delayed_work_sync(&dbc->event_work);  in xhci_dbc_stop()
663 	spin_lock_irqsave(&dbc->lock, flags);  in xhci_dbc_stop()
664 	ret = xhci_do_dbc_stop(dbc);  in xhci_dbc_stop()
665 	spin_unlock_irqrestore(&dbc->lock, flags);  in xhci_dbc_stop()
669 	xhci_dbc_mem_cleanup(dbc);  in xhci_dbc_stop()
670 	pm_runtime_put_sync(dbc->dev); /* note, was self.controller */  in xhci_dbc_stop()
674 handle_ep_halt_changes(struct xhci_dbc *dbc, struct dbc_ep *dep, bool halted)  in handle_ep_halt_changes()  argument
677 		dev_info(dbc->dev, "DbC Endpoint halted\n");  in handle_ep_halt_changes()
681 		dev_info(dbc->dev, "DbC Endpoint halt cleared\n");  in handle_ep_halt_changes()
686 			       &dbc->regs->doorbell);  in handle_ep_halt_changes()
691 dbc_handle_port_status(struct xhci_dbc *dbc, union xhci_trb *event)  in dbc_handle_port_status()  argument
695 	portsc = readl(&dbc->regs->portsc);  in dbc_handle_port_status()
697 		dev_info(dbc->dev, "DbC port connect change\n");  in dbc_handle_port_status()
700 		dev_info(dbc->dev, "DbC port reset change\n");  in dbc_handle_port_status()
703 		dev_info(dbc->dev, "DbC port link status change\n");  in dbc_handle_port_status()
706 		dev_info(dbc->dev, "DbC config error change\n");  in dbc_handle_port_status()
709 	writel(portsc & ~DBC_PORTSC_RESET_CHANGE, &dbc->regs->portsc);  in dbc_handle_port_status()
712 static void dbc_handle_xfer_event(struct xhci_dbc *dbc, union xhci_trb *event)  in dbc_handle_xfer_event()  argument
727 				get_out_ep(dbc) : get_in_ep(dbc);  in dbc_handle_xfer_event()
729 				dbc_bulkout_ctx(dbc) : dbc_bulkin_ctx(dbc);  in dbc_handle_xfer_event()
739 			dev_warn(dbc->dev, "Give back stale stalled req\n");  in dbc_handle_xfer_event()
746 		dev_warn(dbc->dev, "no matched request\n");  in dbc_handle_xfer_event()
762 		dev_warn(dbc->dev, "tx error %d detected\n", comp_code);  in dbc_handle_xfer_event()
766 		dev_warn(dbc->dev, "Stall error at bulk TRB %llx, remaining %zu, ep deq %llx\n",  in dbc_handle_xfer_event()
787 			dev_dbg(dbc->dev, "Ep stopped on Stalled TRB\n");  in dbc_handle_xfer_event()
789 				dev_dbg(dbc->dev, "Spurious stall event, keep req\n");  in dbc_handle_xfer_event()
794 			dev_dbg(dbc->dev, "Give back stalled req, but turn TRB to No-op\n");  in dbc_handle_xfer_event()
800 		dev_err(dbc->dev, "unknown tx error %d\n", comp_code);  in dbc_handle_xfer_event()
821 static enum evtreturn xhci_dbc_do_handle_events(struct xhci_dbc *dbc)  in xhci_dbc_do_handle_events()  argument
829 	switch (dbc->state) {  in xhci_dbc_do_handle_events()
835 		portsc = readl(&dbc->regs->portsc);  in xhci_dbc_do_handle_events()
837 			dbc->state = DS_CONNECTED;  in xhci_dbc_do_handle_events()
838 			dev_info(dbc->dev, "DbC connected\n");  in xhci_dbc_do_handle_events()
843 		ctrl = readl(&dbc->regs->control);  in xhci_dbc_do_handle_events()
845 			dbc->state = DS_CONFIGURED;  in xhci_dbc_do_handle_events()
846 			dev_info(dbc->dev, "DbC configured\n");  in xhci_dbc_do_handle_events()
847 			portsc = readl(&dbc->regs->portsc);  in xhci_dbc_do_handle_events()
848 			writel(portsc, &dbc->regs->portsc);  in xhci_dbc_do_handle_events()
855 		portsc = readl(&dbc->regs->portsc);  in xhci_dbc_do_handle_events()
858 			dev_info(dbc->dev, "DbC cable unplugged\n");  in xhci_dbc_do_handle_events()
859 			dbc->state = DS_ENABLED;  in xhci_dbc_do_handle_events()
860 			xhci_dbc_flush_requests(dbc);  in xhci_dbc_do_handle_events()
867 			dev_info(dbc->dev, "DbC port reset\n");  in xhci_dbc_do_handle_events()
868 			writel(portsc, &dbc->regs->portsc);  in xhci_dbc_do_handle_events()
869 			dbc->state = DS_ENABLED;  in xhci_dbc_do_handle_events()
870 			xhci_dbc_flush_requests(dbc);  in xhci_dbc_do_handle_events()
876 		ctrl = readl(&dbc->regs->control);  in xhci_dbc_do_handle_events()
877 		handle_ep_halt_changes(dbc, get_in_ep(dbc), ctrl & DBC_CTRL_HALT_IN_TR);  in xhci_dbc_do_handle_events()
878 		handle_ep_halt_changes(dbc, get_out_ep(dbc), ctrl & DBC_CTRL_HALT_OUT_TR);  in xhci_dbc_do_handle_events()
882 			writel(ctrl, &dbc->regs->control);  in xhci_dbc_do_handle_events()
883 			ctrl = readl(&dbc->regs->control);  in xhci_dbc_do_handle_events()
887 		dev_err(dbc->dev, "Unknown DbC state %d\n", dbc->state);  in xhci_dbc_do_handle_events()
892 	evt = dbc->ring_evt->dequeue;  in xhci_dbc_do_handle_events()
894 			dbc->ring_evt->cycle_state) {  in xhci_dbc_do_handle_events()
901 		trace_xhci_dbc_handle_event(dbc->ring_evt, &evt->generic);  in xhci_dbc_do_handle_events()
905 			dbc_handle_port_status(dbc, evt);  in xhci_dbc_do_handle_events()
908 			dbc_handle_xfer_event(dbc, evt);  in xhci_dbc_do_handle_events()
914 		inc_evt_deq(dbc->ring_evt);  in xhci_dbc_do_handle_events()
916 		evt = dbc->ring_evt->dequeue;  in xhci_dbc_do_handle_events()
922 		deq = xhci_trb_virt_to_dma(dbc->ring_evt->deq_seg,  in xhci_dbc_do_handle_events()
923 					   dbc->ring_evt->dequeue);  in xhci_dbc_do_handle_events()
924 		lo_hi_writeq(deq, &dbc->regs->erdp);  in xhci_dbc_do_handle_events()
933 	struct xhci_dbc		*dbc;  in xhci_dbc_handle_events()  local
937 	dbc = container_of(to_delayed_work(work), struct xhci_dbc, event_work);  in xhci_dbc_handle_events()
938 	poll_interval = dbc->poll_interval;  in xhci_dbc_handle_events()
940 	spin_lock_irqsave(&dbc->lock, flags);  in xhci_dbc_handle_events()
941 	evtr = xhci_dbc_do_handle_events(dbc);  in xhci_dbc_handle_events()
942 	spin_unlock_irqrestore(&dbc->lock, flags);  in xhci_dbc_handle_events()
946 		if (dbc->driver->configure)  in xhci_dbc_handle_events()
947 			dbc->driver->configure(dbc);  in xhci_dbc_handle_events()
950 		if (dbc->driver->disconnect)  in xhci_dbc_handle_events()
951 			dbc->driver->disconnect(dbc);  in xhci_dbc_handle_events()
955 		if (!list_empty(&dbc->eps[BULK_OUT].list_pending) ||  in xhci_dbc_handle_events()
956 		    !list_empty(&dbc->eps[BULK_IN].list_pending))  in xhci_dbc_handle_events()
960 		dev_info(dbc->dev, "stop handling dbc events\n");  in xhci_dbc_handle_events()
964 	mod_delayed_work(system_wq, &dbc->event_work,  in xhci_dbc_handle_events()
980 	struct xhci_dbc		*dbc;  in dbc_show()  local
984 	dbc = xhci->dbc;  in dbc_show()
986 	if (dbc->state >= ARRAY_SIZE(dbc_state_strings))  in dbc_show()
989 	return sysfs_emit(buf, "%s\n", dbc_state_strings[dbc->state]);  in dbc_show()
997 	struct xhci_dbc		*dbc;  in dbc_store()  local
1000 	dbc = xhci->dbc;  in dbc_store()
1003 		xhci_dbc_start(dbc);  in dbc_store()
1005 		xhci_dbc_stop(dbc);  in dbc_store()
1016 	struct xhci_dbc		*dbc;  in dbc_idVendor_show()  local
1020 	dbc = xhci->dbc;  in dbc_idVendor_show()
1022 	return sysfs_emit(buf, "%04x\n", dbc->idVendor);  in dbc_idVendor_show()
1029 	struct xhci_dbc		*dbc;  in dbc_idVendor_store()  local
1041 	dbc = xhci->dbc;  in dbc_idVendor_store()
1042 	if (dbc->state != DS_DISABLED)  in dbc_idVendor_store()
1045 	dbc->idVendor = value;  in dbc_idVendor_store()
1046 	ptr = &dbc->regs->devinfo1;  in dbc_idVendor_store()
1058 	struct xhci_dbc         *dbc;  in dbc_idProduct_show()  local
1062 	dbc = xhci->dbc;  in dbc_idProduct_show()
1064 	return sysfs_emit(buf, "%04x\n", dbc->idProduct);  in dbc_idProduct_show()
1071 	struct xhci_dbc         *dbc;  in dbc_idProduct_store()  local
1083 	dbc = xhci->dbc;  in dbc_idProduct_store()
1084 	if (dbc->state != DS_DISABLED)  in dbc_idProduct_store()
1087 	dbc->idProduct = value;  in dbc_idProduct_store()
1088 	ptr = &dbc->regs->devinfo2;  in dbc_idProduct_store()
1099 	struct xhci_dbc	*dbc;  in dbc_bcdDevice_show()  local
1103 	dbc = xhci->dbc;  in dbc_bcdDevice_show()
1105 	return sysfs_emit(buf, "%04x\n", dbc->bcdDevice);  in dbc_bcdDevice_show()
1112 	struct xhci_dbc	*dbc;  in dbc_bcdDevice_store()  local
1124 	dbc = xhci->dbc;  in dbc_bcdDevice_store()
1125 	if (dbc->state != DS_DISABLED)  in dbc_bcdDevice_store()
1128 	dbc->bcdDevice = value;  in dbc_bcdDevice_store()
1129 	ptr = &dbc->regs->devinfo2;  in dbc_bcdDevice_store()
1141 	struct xhci_dbc	*dbc;  in dbc_bInterfaceProtocol_show()  local
1145 	dbc = xhci->dbc;  in dbc_bInterfaceProtocol_show()
1147 	return sysfs_emit(buf, "%02x\n", dbc->bInterfaceProtocol);  in dbc_bInterfaceProtocol_show()
1154 	struct xhci_dbc *dbc;  in dbc_bInterfaceProtocol_store()  local
1171 	dbc = xhci->dbc;  in dbc_bInterfaceProtocol_store()
1172 	if (dbc->state != DS_DISABLED)  in dbc_bInterfaceProtocol_store()
1175 	dbc->bInterfaceProtocol = value;  in dbc_bInterfaceProtocol_store()
1176 	ptr = &dbc->regs->devinfo1;  in dbc_bInterfaceProtocol_store()
1188 	struct xhci_dbc *dbc;  in dbc_poll_interval_ms_show()  local
1192 	dbc = xhci->dbc;  in dbc_poll_interval_ms_show()
1194 	return sysfs_emit(buf, "%u\n", dbc->poll_interval);  in dbc_poll_interval_ms_show()
1201 	struct xhci_dbc *dbc;  in dbc_poll_interval_ms_store()  local
1211 	dbc = xhci->dbc;  in dbc_poll_interval_ms_store()
1213 	dbc->poll_interval = value;  in dbc_poll_interval_ms_store()
1215 	mod_delayed_work(system_wq, &dbc->event_work, 0);  in dbc_poll_interval_ms_store()
1220 static DEVICE_ATTR_RW(dbc);
1241 	struct xhci_dbc		*dbc;  in xhci_alloc_dbc()  local
1244 	dbc = kzalloc(sizeof(*dbc), GFP_KERNEL);  in xhci_alloc_dbc()
1245 	if (!dbc)  in xhci_alloc_dbc()
1248 	dbc->regs = base;  in xhci_alloc_dbc()
1249 	dbc->dev = dev;  in xhci_alloc_dbc()
1250 	dbc->driver = driver;  in xhci_alloc_dbc()
1251 	dbc->idProduct = DBC_PRODUCT_ID;  in xhci_alloc_dbc()
1252 	dbc->idVendor = DBC_VENDOR_ID;  in xhci_alloc_dbc()
1253 	dbc->bcdDevice = DBC_DEVICE_REV;  in xhci_alloc_dbc()
1254 	dbc->bInterfaceProtocol = DBC_PROTOCOL;  in xhci_alloc_dbc()
1255 	dbc->poll_interval = DBC_POLL_INTERVAL_DEFAULT;  in xhci_alloc_dbc()
1257 	if (readl(&dbc->regs->control) & DBC_CTRL_DBC_ENABLE)  in xhci_alloc_dbc()
1260 	INIT_DELAYED_WORK(&dbc->event_work, xhci_dbc_handle_events);  in xhci_alloc_dbc()
1261 	spin_lock_init(&dbc->lock);  in xhci_alloc_dbc()
1267 	return dbc;  in xhci_alloc_dbc()
1269 	kfree(dbc);  in xhci_alloc_dbc()
1274 void xhci_dbc_remove(struct xhci_dbc *dbc)  in xhci_dbc_remove()  argument
1276 	if (!dbc)  in xhci_dbc_remove()
1279 	xhci_dbc_stop(dbc);  in xhci_dbc_remove()
1282 	sysfs_remove_groups(&dbc->dev->kobj, dbc_dev_groups);  in xhci_dbc_remove()
1284 	kfree(dbc);  in xhci_dbc_remove()
1304 	if (xhci->dbc)  in xhci_create_dbc_dev()
1316 	if (!xhci->dbc)  in xhci_remove_dbc_dev()
1319 	xhci_dbc_tty_remove(xhci->dbc);  in xhci_remove_dbc_dev()
1321 	xhci->dbc = NULL;  in xhci_remove_dbc_dev()
1328 	struct xhci_dbc		*dbc = xhci->dbc;  in xhci_dbc_suspend()  local
1330 	if (!dbc)  in xhci_dbc_suspend()
1333 	if (dbc->state == DS_CONFIGURED)  in xhci_dbc_suspend()
1334 		dbc->resume_required = 1;  in xhci_dbc_suspend()
1336 	xhci_dbc_stop(dbc);  in xhci_dbc_suspend()
1344 	struct xhci_dbc		*dbc = xhci->dbc;  in xhci_dbc_resume()  local
1346 	if (!dbc)  in xhci_dbc_resume()
1349 	if (dbc->resume_required) {  in xhci_dbc_resume()
1350 		dbc->resume_required = 0;  in xhci_dbc_resume()
1351 		xhci_dbc_start(dbc);  in xhci_dbc_resume()