2 * drivers/usb/host/ehci-vt8500.c
4 * Copyright (C) 2010 Alexey Charkov <alchark@gmail.com>
6 * Based on ehci-au1xxx.c
8 * This software is licensed under the terms of the GNU General Public
9 * License version 2, as published by the Free Software Foundation, and
10 * may be copied, distributed, and modified under those terms.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
20 #include <linux/platform_device.h>
22 static int ehci_update_device(struct usb_hcd *hcd, struct usb_device *udev)
24 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
27 if (!udev->parent) /* udev is root hub itself, impossible */
29 /* we only support lpm device connected to root hub yet */
30 if (ehci->has_lpm && !udev->parent->parent) {
31 rc = ehci_lpm_set_da(ehci, udev->devnum, udev->portnum);
33 rc = ehci_lpm_check(ehci, udev->portnum);
38 static const struct hc_driver vt8500_ehci_hc_driver = {
39 .description = hcd_name,
40 .product_desc = "VT8500 EHCI",
41 .hcd_priv_size = sizeof(struct ehci_hcd),
44 * generic hardware linkage
47 .flags = HCD_MEMORY | HCD_USB2,
50 * basic lifecycle operations
55 .shutdown = ehci_shutdown,
58 * managing i/o requests and associated device resources
60 .urb_enqueue = ehci_urb_enqueue,
61 .urb_dequeue = ehci_urb_dequeue,
62 .endpoint_disable = ehci_endpoint_disable,
63 .endpoint_reset = ehci_endpoint_reset,
68 .get_frame_number = ehci_get_frame,
73 .hub_status_data = ehci_hub_status_data,
74 .hub_control = ehci_hub_control,
75 .bus_suspend = ehci_bus_suspend,
76 .bus_resume = ehci_bus_resume,
77 .relinquish_port = ehci_relinquish_port,
78 .port_handed_over = ehci_port_handed_over,
81 * call back when device connected and addressed
83 .update_device = ehci_update_device,
85 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
88 static u64 vt8500_ehci_dma_mask = DMA_BIT_MASK(32);
90 static int vt8500_ehci_drv_probe(struct platform_device *pdev)
93 struct ehci_hcd *ehci;
101 * Right now device-tree probed devices don't get dma_mask set.
102 * Since shared usb code relies on it, set it here for now.
103 * Once we have dma capability bindings this can go away.
105 if (!pdev->dev.dma_mask)
106 pdev->dev.dma_mask = &vt8500_ehci_dma_mask;
108 if (pdev->resource[1].flags != IORESOURCE_IRQ) {
109 pr_debug("resource[1] is not IORESOURCE_IRQ");
112 hcd = usb_create_hcd(&vt8500_ehci_hc_driver, &pdev->dev, "VT8500");
116 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
117 hcd->rsrc_start = res->start;
118 hcd->rsrc_len = resource_size(res);
120 hcd->regs = devm_request_and_ioremap(&pdev->dev, res);
122 pr_debug("ioremap failed");
127 ehci = hcd_to_ehci(hcd);
128 ehci->caps = hcd->regs;
130 ret = usb_add_hcd(hcd, pdev->resource[1].start,
133 platform_set_drvdata(pdev, hcd);
142 static int vt8500_ehci_drv_remove(struct platform_device *pdev)
144 struct usb_hcd *hcd = platform_get_drvdata(pdev);
148 platform_set_drvdata(pdev, NULL);
153 static const struct of_device_id vt8500_ehci_ids[] = {
154 { .compatible = "via,vt8500-ehci", },
155 { .compatible = "wm,prizm-ehci", },
159 static struct platform_driver vt8500_ehci_driver = {
160 .probe = vt8500_ehci_drv_probe,
161 .remove = vt8500_ehci_drv_remove,
162 .shutdown = usb_hcd_platform_shutdown,
164 .name = "vt8500-ehci",
165 .owner = THIS_MODULE,
166 .of_match_table = of_match_ptr(vt8500_ehci_ids),
170 MODULE_ALIAS("platform:vt8500-ehci");
171 MODULE_DEVICE_TABLE(of, vt8500_ehci_ids);