1 // SPDX-License-Identifier: GPL-2.0
3  * Generic UHCI HCD (Host Controller Driver) for Platform Devices
7  * This file is based on uhci-grlib.c
8  * (C) Copyright 2004-2007 Alan Stern, [email protected]
17 	struct uhci_hcd *uhci = hcd_to_uhci(hcd);  in uhci_platform_init()  local
20 	if (!uhci->rh_numports)  in uhci_platform_init()
21 		uhci->rh_numports = uhci_count_ports(hcd);  in uhci_platform_init()
23 	/* Set up pointers to to generic functions */  in uhci_platform_init()
24 	uhci->reset_hc = uhci_generic_reset_hc;  in uhci_platform_init()
25 	uhci->check_and_reset_hc = uhci_generic_check_and_reset_hc;  in uhci_platform_init()
28 	uhci->configure_hc = NULL;  in uhci_platform_init()
29 	uhci->resume_detect_interrupts_are_broken = NULL;  in uhci_platform_init()
30 	uhci->global_suspend_mode_is_broken = NULL;  in uhci_platform_init()
33 	check_and_reset_hc(uhci);  in uhci_platform_init()
39 	.product_desc =		"Generic UHCI Host Controller",
42 	/* Generic hardware linkage */
69 	struct device_node *np = pdev->dev.of_node;  in uhci_hcd_platform_probe()
71 	struct uhci_hcd	*uhci;  in uhci_hcd_platform_probe()  local
76 		return -ENODEV;  in uhci_hcd_platform_probe()
79 	 * Right now device-tree probed devices don't get dma_mask set.  in uhci_hcd_platform_probe()
83 	ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));  in uhci_hcd_platform_probe()
87 	hcd = usb_create_hcd(&uhci_platform_hc_driver, &pdev->dev,  in uhci_hcd_platform_probe()
88 			pdev->name);  in uhci_hcd_platform_probe()
90 		return -ENOMEM;  in uhci_hcd_platform_probe()
92 	uhci = hcd_to_uhci(hcd);  in uhci_hcd_platform_probe()
94 	hcd->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);  in uhci_hcd_platform_probe()
95 	if (IS_ERR(hcd->regs)) {  in uhci_hcd_platform_probe()
96 		ret = PTR_ERR(hcd->regs);  in uhci_hcd_platform_probe()
99 	hcd->rsrc_start = res->start;  in uhci_hcd_platform_probe()
100 	hcd->rsrc_len = resource_size(res);  in uhci_hcd_platform_probe()
102 	uhci->regs = hcd->regs;  in uhci_hcd_platform_probe()
104 	/* Grab some things from the device-tree */  in uhci_hcd_platform_probe()
109 			uhci->rh_numports = num_ports;  in uhci_hcd_platform_probe()
110 			dev_info(&pdev->dev,  in uhci_hcd_platform_probe()
111 				"Detected %d ports from device-tree\n",  in uhci_hcd_platform_probe()
114 		if (of_device_is_compatible(np, "aspeed,ast2400-uhci") ||  in uhci_hcd_platform_probe()
115 		    of_device_is_compatible(np, "aspeed,ast2500-uhci") ||  in uhci_hcd_platform_probe()
116 		    of_device_is_compatible(np, "aspeed,ast2600-uhci")) {  in uhci_hcd_platform_probe()
117 			uhci->is_aspeed = 1;  in uhci_hcd_platform_probe()
118 			dev_info(&pdev->dev,  in uhci_hcd_platform_probe()
124 	uhci->clk = devm_clk_get(&pdev->dev, NULL);  in uhci_hcd_platform_probe()
125 	if (IS_ERR(uhci->clk)) {  in uhci_hcd_platform_probe()
126 		ret = PTR_ERR(uhci->clk);  in uhci_hcd_platform_probe()
129 	ret = clk_prepare_enable(uhci->clk);  in uhci_hcd_platform_probe()
131 		dev_err(&pdev->dev, "Error couldn't enable clock (%d)\n", ret);  in uhci_hcd_platform_probe()
143 	device_wakeup_enable(hcd->self.controller);  in uhci_hcd_platform_probe()
147 	clk_disable_unprepare(uhci->clk);  in uhci_hcd_platform_probe()
157 	struct uhci_hcd *uhci = hcd_to_uhci(hcd);  in uhci_hcd_platform_remove()  local
159 	clk_disable_unprepare(uhci->clk);  in uhci_hcd_platform_remove()
179 	{ .compatible = "generic-uhci", },
180 	{ .compatible = "platform-uhci", },
190 		.name = "platform-uhci",