2 * Bus Glue for Loongson LS1X built-in EHCI controller.
4 * Copyright (c) 2012 Zhang, Keguang <keguang.zhang@gmail.com>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published
8 * by the Free Software Foundation.
12 #include <linux/platform_device.h>
14 static int ehci_ls1x_reset(struct usb_hcd *hcd)
16 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
19 ehci->caps = hcd->regs;
21 ret = ehci_setup(hcd);
25 ehci_port_power(ehci, 0);
30 static const struct hc_driver ehci_ls1x_hc_driver = {
31 .description = hcd_name,
32 .product_desc = "LOONGSON1 EHCI",
33 .hcd_priv_size = sizeof(struct ehci_hcd),
36 * generic hardware linkage
39 .flags = HCD_MEMORY | HCD_USB2,
42 * basic lifecycle operations
44 .reset = ehci_ls1x_reset,
47 .shutdown = ehci_shutdown,
50 * managing i/o requests and associated device resources
52 .urb_enqueue = ehci_urb_enqueue,
53 .urb_dequeue = ehci_urb_dequeue,
54 .endpoint_disable = ehci_endpoint_disable,
55 .endpoint_reset = ehci_endpoint_reset,
60 .get_frame_number = ehci_get_frame,
65 .hub_status_data = ehci_hub_status_data,
66 .hub_control = ehci_hub_control,
67 .relinquish_port = ehci_relinquish_port,
68 .port_handed_over = ehci_port_handed_over,
70 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
73 static int ehci_hcd_ls1x_probe(struct platform_device *pdev)
80 pr_debug("initializing loongson1 ehci USB Controller\n");
85 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
88 "Found HC with no IRQ. Check %s setup!\n",
89 dev_name(&pdev->dev));
94 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
97 "Found HC with no register addr. Check %s setup!\n",
98 dev_name(&pdev->dev));
102 hcd = usb_create_hcd(&ehci_ls1x_hc_driver, &pdev->dev,
103 dev_name(&pdev->dev));
106 hcd->rsrc_start = res->start;
107 hcd->rsrc_len = resource_size(res);
109 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
110 dev_dbg(&pdev->dev, "controller already in use\n");
115 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
116 if (hcd->regs == NULL) {
117 dev_dbg(&pdev->dev, "error mapping memory\n");
119 goto err_release_region;
122 ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
131 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
137 static int ehci_hcd_ls1x_remove(struct platform_device *pdev)
139 struct usb_hcd *hcd = platform_get_drvdata(pdev);
143 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
149 static struct platform_driver ehci_ls1x_driver = {
150 .probe = ehci_hcd_ls1x_probe,
151 .remove = ehci_hcd_ls1x_remove,
152 .shutdown = usb_hcd_platform_shutdown,
155 .owner = THIS_MODULE,
159 MODULE_ALIAS(PLATFORM_MODULE_PREFIX "ls1x-ehci");