18 dbc_dma_alloc_coherent(struct xhci_hcd *xhci, size_t size,  in dbc_dma_alloc_coherent()  argument
23 	vaddr = dma_alloc_coherent(xhci_to_hcd(xhci)->self.sysdev,  in dbc_dma_alloc_coherent()
30 dbc_dma_free_coherent(struct xhci_hcd *xhci, size_t size,  in dbc_dma_free_coherent()  argument
34 		dma_free_coherent(xhci_to_hcd(xhci)->self.sysdev,  in dbc_dma_free_coherent()
87 static void xhci_dbc_init_contexts(struct xhci_hcd *xhci, u32 string_length)  in xhci_dbc_init_contexts()  argument
96 	dbc = xhci->dbc;  in xhci_dbc_init_contexts()
125 	xhci_write_64(xhci, dbc->ctx->dma, &dbc->regs->dccp);  in xhci_dbc_init_contexts()
140 	struct xhci_hcd		*xhci = dbc->xhci;  in xhci_dbc_giveback()  local
141 	struct device		*dev = xhci_to_hcd(dbc->xhci)->self.sysdev;  in xhci_dbc_giveback()
159 	req->complete(xhci, req);  in xhci_dbc_giveback()
295 	struct xhci_hcd		*xhci = dbc->xhci;  in dbc_ep_do_queue()  local
297 	dev = xhci_to_hcd(xhci)->self.sysdev;  in dbc_ep_do_queue()
310 		xhci_err(xhci, "failed to map buffer\n");  in dbc_ep_do_queue()
316 		xhci_err(xhci, "failed to queue trbs\n");  in dbc_ep_do_queue()
348 static inline void xhci_dbc_do_eps_init(struct xhci_hcd *xhci, bool direction)  in xhci_dbc_do_eps_init()  argument
351 	struct xhci_dbc		*dbc = xhci->dbc;  in xhci_dbc_do_eps_init()
361 static void xhci_dbc_eps_init(struct xhci_hcd *xhci)  in xhci_dbc_eps_init()  argument
363 	xhci_dbc_do_eps_init(xhci, BULK_OUT);  in xhci_dbc_eps_init()
364 	xhci_dbc_do_eps_init(xhci, BULK_IN);  in xhci_dbc_eps_init()
367 static void xhci_dbc_eps_exit(struct xhci_hcd *xhci)  in xhci_dbc_eps_exit()  argument
369 	struct xhci_dbc		*dbc = xhci->dbc;  in xhci_dbc_eps_exit()
374 static int xhci_dbc_mem_init(struct xhci_hcd *xhci, gfp_t flags)  in xhci_dbc_mem_init()  argument
379 	struct xhci_dbc		*dbc = xhci->dbc;  in xhci_dbc_mem_init()
382 	dbc->ring_evt = xhci_ring_alloc(xhci, 1, 1, TYPE_EVENT, 0, flags);  in xhci_dbc_mem_init()
386 	dbc->ring_in = xhci_ring_alloc(xhci, 1, 1, TYPE_BULK, 0, flags);  in xhci_dbc_mem_init()
390 	dbc->ring_out = xhci_ring_alloc(xhci, 1, 1, TYPE_BULK, 0, flags);  in xhci_dbc_mem_init()
395 	ret = xhci_alloc_erst(xhci, dbc->ring_evt, &dbc->erst, flags);  in xhci_dbc_mem_init()
400 	dbc->ctx = xhci_alloc_container_ctx(xhci, XHCI_CTX_TYPE_DEVICE, flags);  in xhci_dbc_mem_init()
406 	dbc->string = dbc_dma_alloc_coherent(xhci,  in xhci_dbc_mem_init()
415 	xhci_write_64(xhci, dbc->erst.erst_dma_addr, &dbc->regs->erstba);  in xhci_dbc_mem_init()
418 	xhci_write_64(xhci, deq, &dbc->regs->erdp);  in xhci_dbc_mem_init()
422 	xhci_dbc_init_contexts(xhci, string_length);  in xhci_dbc_mem_init()
426 	xhci_dbc_eps_init(xhci);  in xhci_dbc_mem_init()
432 	xhci_free_container_ctx(xhci, dbc->ctx);  in xhci_dbc_mem_init()
435 	xhci_free_erst(xhci, &dbc->erst);  in xhci_dbc_mem_init()
437 	xhci_ring_free(xhci, dbc->ring_out);  in xhci_dbc_mem_init()
440 	xhci_ring_free(xhci, dbc->ring_in);  in xhci_dbc_mem_init()
443 	xhci_ring_free(xhci, dbc->ring_evt);  in xhci_dbc_mem_init()
449 static void xhci_dbc_mem_cleanup(struct xhci_hcd *xhci)  in xhci_dbc_mem_cleanup()  argument
451 	struct xhci_dbc		*dbc = xhci->dbc;  in xhci_dbc_mem_cleanup()
456 	xhci_dbc_eps_exit(xhci);  in xhci_dbc_mem_cleanup()
459 		dbc_dma_free_coherent(xhci,  in xhci_dbc_mem_cleanup()
465 	xhci_free_container_ctx(xhci, dbc->ctx);  in xhci_dbc_mem_cleanup()
468 	xhci_free_erst(xhci, &dbc->erst);  in xhci_dbc_mem_cleanup()
469 	xhci_ring_free(xhci, dbc->ring_out);  in xhci_dbc_mem_cleanup()
470 	xhci_ring_free(xhci, dbc->ring_in);  in xhci_dbc_mem_cleanup()
471 	xhci_ring_free(xhci, dbc->ring_evt);  in xhci_dbc_mem_cleanup()
477 static int xhci_do_dbc_start(struct xhci_hcd *xhci)  in xhci_do_dbc_start()  argument
481 	struct xhci_dbc		*dbc = xhci->dbc;  in xhci_do_dbc_start()
493 	ret = xhci_dbc_mem_init(xhci, GFP_ATOMIC);  in xhci_do_dbc_start()
511 static int xhci_do_dbc_stop(struct xhci_hcd *xhci)  in xhci_do_dbc_stop()  argument
513 	struct xhci_dbc		*dbc = xhci->dbc;  in xhci_do_dbc_stop()
519 	xhci_dbc_mem_cleanup(xhci);  in xhci_do_dbc_stop()
525 static int xhci_dbc_start(struct xhci_hcd *xhci)  in xhci_dbc_start()  argument
529 	struct xhci_dbc		*dbc = xhci->dbc;  in xhci_dbc_start()
533 	pm_runtime_get_sync(xhci_to_hcd(xhci)->self.controller);  in xhci_dbc_start()
536 	ret = xhci_do_dbc_start(xhci);  in xhci_dbc_start()
540 		pm_runtime_put(xhci_to_hcd(xhci)->self.controller);  in xhci_dbc_start()
547 static void xhci_dbc_stop(struct xhci_hcd *xhci)  in xhci_dbc_stop()  argument
551 	struct xhci_dbc		*dbc = xhci->dbc;  in xhci_dbc_stop()
559 		xhci_dbc_tty_unregister_device(xhci);  in xhci_dbc_stop()
562 	ret = xhci_do_dbc_stop(xhci);  in xhci_dbc_stop()
566 		pm_runtime_put_sync(xhci_to_hcd(xhci)->self.controller);  in xhci_dbc_stop()
570 dbc_handle_port_status(struct xhci_hcd *xhci, union xhci_trb *event)  in dbc_handle_port_status()  argument
573 	struct xhci_dbc		*dbc = xhci->dbc;  in dbc_handle_port_status()
577 		xhci_info(xhci, "DbC port connect change\n");  in dbc_handle_port_status()
580 		xhci_info(xhci, "DbC port reset change\n");  in dbc_handle_port_status()
583 		xhci_info(xhci, "DbC port link status change\n");  in dbc_handle_port_status()
586 		xhci_info(xhci, "DbC config error change\n");  in dbc_handle_port_status()
592 static void dbc_handle_xfer_event(struct xhci_hcd *xhci, union xhci_trb *event)  in dbc_handle_xfer_event()  argument
606 				get_out_ep(xhci) : get_in_ep(xhci);  in dbc_handle_xfer_event()
620 		xhci_warn(xhci, "tx error %d detected\n", comp_code);  in dbc_handle_xfer_event()
624 		xhci_err(xhci, "unknown tx error %d\n", comp_code);  in dbc_handle_xfer_event()
638 		xhci_warn(xhci, "no matched request\n");  in dbc_handle_xfer_event()
655 	struct xhci_hcd		*xhci = dbc->xhci;  in xhci_dbc_do_handle_events()  local
668 			xhci_info(xhci, "DbC connected\n");  in xhci_dbc_do_handle_events()
676 			xhci_info(xhci, "DbC configured\n");  in xhci_dbc_do_handle_events()
688 			xhci_info(xhci, "DbC cable unplugged\n");  in xhci_dbc_do_handle_events()
697 			xhci_info(xhci, "DbC port reset\n");  in xhci_dbc_do_handle_events()
709 			xhci_info(xhci, "DbC Endpoint stall\n");  in xhci_dbc_do_handle_events()
713 				dep = get_in_ep(xhci);  in xhci_dbc_do_handle_events()
718 				dep = get_out_ep(xhci);  in xhci_dbc_do_handle_events()
743 		xhci_err(xhci, "Unknown DbC state %d\n", dbc->state);  in xhci_dbc_do_handle_events()
761 			dbc_handle_port_status(xhci, evt);  in xhci_dbc_do_handle_events()
764 			dbc_handle_xfer_event(xhci, evt);  in xhci_dbc_do_handle_events()
770 		inc_deq(xhci, dbc->ring_evt);  in xhci_dbc_do_handle_events()
779 		xhci_write_64(xhci, deq, &dbc->regs->erdp);  in xhci_dbc_do_handle_events()
791 	struct xhci_hcd		*xhci;  in xhci_dbc_handle_events()  local
794 	xhci = dbc->xhci;  in xhci_dbc_handle_events()
802 		ret = xhci_dbc_tty_register_device(xhci);  in xhci_dbc_handle_events()
804 			xhci_err(xhci, "failed to alloc tty device\n");  in xhci_dbc_handle_events()
808 		xhci_info(xhci, "DbC now attached to /dev/ttyDBC0\n");  in xhci_dbc_handle_events()
811 		xhci_dbc_tty_unregister_device(xhci);  in xhci_dbc_handle_events()
816 		xhci_info(xhci, "stop handling dbc events\n");  in xhci_dbc_handle_events()
823 static void xhci_do_dbc_exit(struct xhci_hcd *xhci)  in xhci_do_dbc_exit()  argument
827 	spin_lock_irqsave(&xhci->lock, flags);  in xhci_do_dbc_exit()
828 	kfree(xhci->dbc);  in xhci_do_dbc_exit()
829 	xhci->dbc = NULL;  in xhci_do_dbc_exit()
830 	spin_unlock_irqrestore(&xhci->lock, flags);  in xhci_do_dbc_exit()
833 static int xhci_do_dbc_init(struct xhci_hcd *xhci)  in xhci_do_dbc_init()  argument
841 	base = &xhci->cap_regs->hc_capbase;  in xhci_do_dbc_init()
859 	spin_lock_irqsave(&xhci->lock, flags);  in xhci_do_dbc_init()
860 	if (xhci->dbc) {  in xhci_do_dbc_init()
861 		spin_unlock_irqrestore(&xhci->lock, flags);  in xhci_do_dbc_init()
865 	xhci->dbc = dbc;  in xhci_do_dbc_init()
866 	spin_unlock_irqrestore(&xhci->lock, flags);  in xhci_do_dbc_init()
868 	dbc->xhci = xhci;  in xhci_do_dbc_init()
881 	struct xhci_hcd		*xhci;  in dbc_show()  local
883 	xhci = hcd_to_xhci(dev_get_drvdata(dev));  in dbc_show()
884 	dbc = xhci->dbc;  in dbc_show()
916 	struct xhci_hcd		*xhci;  in dbc_store()  local
918 	xhci = hcd_to_xhci(dev_get_drvdata(dev));  in dbc_store()
921 		xhci_dbc_start(xhci);  in dbc_store()
923 		xhci_dbc_stop(xhci);  in dbc_store()
932 int xhci_dbc_init(struct xhci_hcd *xhci)  in xhci_dbc_init()  argument
935 	struct device		*dev = xhci_to_hcd(xhci)->self.controller;  in xhci_dbc_init()
937 	ret = xhci_do_dbc_init(xhci);  in xhci_dbc_init()
941 	ret = xhci_dbc_tty_register_driver(xhci);  in xhci_dbc_init()
954 	xhci_do_dbc_exit(xhci);  in xhci_dbc_init()
959 void xhci_dbc_exit(struct xhci_hcd *xhci)  in xhci_dbc_exit()  argument
961 	struct device		*dev = xhci_to_hcd(xhci)->self.controller;  in xhci_dbc_exit()
963 	if (!xhci->dbc)  in xhci_dbc_exit()
968 	xhci_dbc_stop(xhci);  in xhci_dbc_exit()
969 	xhci_do_dbc_exit(xhci);  in xhci_dbc_exit()
973 int xhci_dbc_suspend(struct xhci_hcd *xhci)  in xhci_dbc_suspend()  argument
975 	struct xhci_dbc		*dbc = xhci->dbc;  in xhci_dbc_suspend()
983 	xhci_dbc_stop(xhci);  in xhci_dbc_suspend()
988 int xhci_dbc_resume(struct xhci_hcd *xhci)  in xhci_dbc_resume()  argument
991 	struct xhci_dbc		*dbc = xhci->dbc;  in xhci_dbc_resume()
998 		xhci_dbc_start(xhci);  in xhci_dbc_resume()