1 // SPDX-License-Identifier: GPL-2.0
3  * UHCI HCD (Host Controller Driver) for GRLIB GRUSBHC
7  * This file is based on UHCI PCI HCD:
9  * (C) Copyright 1999-2002 Johannes Erdfelt, [email protected]
16  *               support from usb-ohci.c by Adam Richter, [email protected]).
17  * (C) Copyright 1999 Gregory P. Smith (from usb-ohci.c)
18  * (C) Copyright 2004-2007 Alan Stern, [email protected]
29 	struct uhci_hcd *uhci = hcd_to_uhci(hcd);  in uhci_grlib_init()  local
35 	 * with bit 7 (0x80) turned on then the current little-endian  in uhci_grlib_init()
37 	 * byte-swapped; hence the register interface and presumably  in uhci_grlib_init()
38 	 * also the descriptors are big-endian.  in uhci_grlib_init()
40 	if (!(uhci_readw(uhci, USBPORTSC1) & 0x80)) {  in uhci_grlib_init()
41 		uhci->big_endian_mmio = 1;  in uhci_grlib_init()
42 		uhci->big_endian_desc = 1;  in uhci_grlib_init()
45 	uhci->rh_numports = uhci_count_ports(hcd);  in uhci_grlib_init()
47 	/* Set up pointers to generic functions */  in uhci_grlib_init()
48 	uhci->reset_hc = uhci_generic_reset_hc;  in uhci_grlib_init()
49 	uhci->check_and_reset_hc = uhci_generic_check_and_reset_hc;  in uhci_grlib_init()
51 	uhci->configure_hc = NULL;  in uhci_grlib_init()
52 	uhci->resume_detect_interrupts_are_broken = NULL;  in uhci_grlib_init()
53 	uhci->global_suspend_mode_is_broken = NULL;  in uhci_grlib_init()
56 	check_and_reset_hc(uhci);  in uhci_grlib_init()
62 	.product_desc =		"GRLIB GRUSBHC UHCI Host Controller",
65 	/* Generic hardware linkage */
93 	struct device_node *dn = op->dev.of_node;  in uhci_hcd_grlib_probe()
95 	struct uhci_hcd	*uhci = NULL;  in uhci_hcd_grlib_probe()  local
101 		return -ENODEV;  in uhci_hcd_grlib_probe()
103 	dev_dbg(&op->dev, "initializing GRUSBHC UHCI USB Controller\n");  in uhci_hcd_grlib_probe()
110 	op->dev.dma_mask = &op->dev.coherent_dma_mask;  in uhci_hcd_grlib_probe()
111 	hcd = usb_create_hcd(&uhci_grlib_hc_driver, &op->dev,  in uhci_hcd_grlib_probe()
112 			"GRUSBHC UHCI USB");  in uhci_hcd_grlib_probe()
114 		return -ENOMEM;  in uhci_hcd_grlib_probe()
116 	hcd->rsrc_start = res.start;  in uhci_hcd_grlib_probe()
117 	hcd->rsrc_len = resource_size(&res);  in uhci_hcd_grlib_probe()
122 		rv = -EBUSY;  in uhci_hcd_grlib_probe()
126 	hcd->regs = devm_ioremap_resource(&op->dev, &res);  in uhci_hcd_grlib_probe()
127 	if (IS_ERR(hcd->regs)) {  in uhci_hcd_grlib_probe()
128 		rv = PTR_ERR(hcd->regs);  in uhci_hcd_grlib_probe()
132 	uhci = hcd_to_uhci(hcd);  in uhci_hcd_grlib_probe()
134 	uhci->regs = hcd->regs;  in uhci_hcd_grlib_probe()
140 	device_wakeup_enable(hcd->self.controller);  in uhci_hcd_grlib_probe()
155 	dev_dbg(&op->dev, "stopping GRLIB GRUSBHC UHCI USB Controller\n");  in uhci_hcd_grlib_remove()
159 	irq_dispose_mapping(hcd->irq);  in uhci_hcd_grlib_remove()
190 		.name = "grlib-uhci",